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the study that presents some considerable difficulty to the student. The symbols which we are accustomed to use are the letters of the alphabet, and these letters do not carry any idea of mass, or substance. These letters are the symbols each for a different sound. In the study of algebra, the letters have been used to represent abstract mathematical quantities, or magnitudes. They do not of themselves suggest mass, or substance. Now, in chemistry each symbol is to represent a perfectly definite mass, or weight, a very small particle of an element, called an atom. It becomes

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The creases are made by folding: 1. Into halves, with symbols inside. 2. Into quarters, by folding back the outer free ends, showing the symbols.

Upper half: To show the burning of magnesium ribbon, which is the combining of the element magnesium, Mg, with oxygen O, at somewhat elevated temperatures to form the magnesium oxide, you are to fold so as to bring one Mg (24.3 parts) and one O (16 parts) close to each other. This illustrates the equation: Mg +O = MgO.

Lower half: To show the preparation of hydrogen from a metal as zinc, and an acid, as hydrochloric, by the displacement of the hydrogen of the acid by a metal which is more electro-positive than the hydrogen, you are to so fold that the one Zn (65.4 parts) falls on the two H (2 X 1.008 parts) of the acid, taking their place, forming zinc chloride (ZnCl2) and liberating gaseous hydrogen (H2). This illustrates the equation: Zn + 2HCI = ZnCl2 + H2.

necessary to teach the beginner to associate the idea of mass, or substance, with the letters as used in chemical formulae.

We find that a letter drawn in prospective does convey very readily the idea of mass, or substance.

In the accompanying plate burning as oxidation is illustrated; also,

in the lower half, one can readily visualize the displacement of hydrogen by a metal from an acid. In this manner we present to the beginner such a topic as neutralization of an acid by a base on the ionic theory and it is simplicity itself. The mechanics of the reaction can be easily grasped by the beginner in a way that both interests and instructs at the same time. Many of the great generalizations of the science of chemistry become readily intelligible to the enthusiastic beginners.

A NEW USE FOR THIS JOURNAL

There seems to be an increasing number of colleges and universities planning courses in chemical education for the coming year. Some of the instructors responsible for these courses have already adopted THIS JOURNAL as one of their text-books. If this unexpected use increases, the editors must try to improve THIS JOURNAL so that it will better meet this new situation. Two improvements have already been suggested: One is to have each issue contain an article which has to do with pure methods in chemical education, i. e., education psychology applied to chemical education; a second suggestion is for THIS JOURNAL to contain abstracts of articles on chemical education found in other journals.

All subscribers who wish THIS JOURNAL to function in this new field by incorporating these two suggestions, will notify the editorial office at once. Also send any other suggestions.

PORTRAITS Suitable for Framing-of
EMINENT AMERICAN CHEMISTS

A Collection of portraits of thirty three of the most distinguished American chemists of all periods, beautifully reproduced (many from rare old prints and photographs) and assembled in an attractive loose leaf binder with sketches of the work of each man. Portraits measure 10 x 15 cm. on sheets 20 x 25 cm. Complete set, postpaid, $6 with order. No sets broken.

Published Privately by the Compiler, D. H. Killeffer, 19 East 24th St., New York, N.Y.

LIBRARY BOOKBINDING

Magazines, Fiction and Scientific Journals bound at reasonable prices. MILTON P. HENNEMAN, 309 W. Mulberry Street, Baltimore, Md.

Local Activities and Opportunities

The New England Association of Chemistry Achers: At the Malden Massachusetts High School on March 15th was held the 25th Anniversary of the founding of the Association. The first president, Dr. Lyan C. Newell of Boston University, and tenth president, Mr. Wilhelm Segerblom of Philips Exeter Academy, delivered the principal address. Mr. Segerblom was elected to honorary membership in recognition of his long, faithful and effective efforts in behalf of the Association.

In commemoration of this 25th anniversary meeting, a report of unusual completeness has been issued. This contains the unabridged report of "The Earlier and Later Days of Chemistry in New England," is illustrated by choice photographs of some of the more prominent older New England chemists selected by Dr. Newell, who is well qualified to deal with the subject, having made the history of chemistry a lifelong study. This special report will also contain the complete report on the Laboratory Questionnaire by Mr. Wilhelm Segerblom. Both of these papers will be valuable contributions to the literature of their respective subjects.

A great demand for this special number has been anticipated, and to meet this the Association has printed a large number of extra reports, and will supply copies to non-members and extra copies to members at fifty cents per copy. Order from Mr. Laurence R. Atwood, Secretary, Malden High School, Malden, Mass. Send cash with order.

The Spring Meeting of the Western Division of this Association was held at Mt. Holyoke College, South Hadley, Mass., on Saturday, May 3rd, in connection with the regular meeting of the Connecticut Valley Section of the A. C. S. After and interesting trip through the Whiting Paper Company's Mill No. 1 at Holyoke, the company adjourned to Shattuck Hall, So. Hadley, where Prof. A. J. Hopkins of Amherst College gave an illustrated paper on "Egypt, The Land of the Alchemist."

Following the afternoon business meeting at which thirteen new members were elected, Mr. Robert Langdale of New Haven, Conn. High School gave a series of five lecture table experiments demonstrating spontaneous reaction.

The concluding feature of the afternoon program was a lecture by Prof. James Kendall of Columbia University entitled "The Abuse of Water by Teachers of Chemistry." After critically examining certain of the fundamental concepts of the conventional theory of electrolytic dissociation, Dr. Kendall summarized the main points of a so-called "rational theory" of ionization wherein the familiar phenomena may be shown

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to be the result of varying degrees of compound formation between solvent and solute. This theory is being developed at Columbia University and aims to put the chemistry of solution on a perfectly general basis and not on a strictly water basis as maintains at present.

Most of the members remained for the evening meeting of the Connecticut Valley Section of the American Chemical Society at which Professor Bogart of Columbia gave a lecture on perfumes illustrated by about two hundred colored lantern slides.

Northern Division Meeting: On Saturday, May Tenth, despite inclement weather, about thirty members gathered at Concord, N. H. The morning was devoted to a trip through the Rumford Press, a thoroughly up-to-date plant, about seventy-five per cent of whose business is the printing of such periodicals as The Atlantic Monthly, Century, etc.

After luncheon and the short business meeting held at the Concord High School at which eight new members were elected, Mr. Elwin Damon of Keene, N. H. High School gave a talk on the teaching of "Chlorine."

Professor Charles James of the University of New Hampshire gave a most interesting lecture on his favorite theme, "Metals," showing many specimens of the rare ones and dwelling at length on the difficulties that are encountered in obtaining pure samples of many including the rare earth elements.

Mr. W. K. Robbins, chief chemist of the Amoskeag Manufacturing Co., read a paper entitled "The Chemist in a Textile Mill," touching on the various problems that such a chemist has to solve and stressing the necessity of teaching elementary chemistry students the fundamental general principles of chemistry. The meeting concluded with an informal talk by Mr. Churchill of Eimer and Amend Company on the possibilities of Laboratory apparatus of clear fused quartz of the sort that has recently been made by Mr. Berry of the General Electric Works at Lynn, Mass.

The Association is now operating in four of the six New England States, has a New Englandwide membership of 400, including representatives of nearly all New England colleges, and is about to begin on a campaign to raise its membership to the 500 mark. It will then endeavor to farther extend its operations geographically.

Prof. Martin V. McGill, of Lorain High School, Lorain, Ohio has been elected Chairman of the Chemistry and Physics Section of the Northeastern Ohio Teachers' Association.

A Unique Laboratory "Open House." The Alchemist Club and the chemistry faculty of Vanderbilt University were "at home" on the evening of February 20th to the citizens of Nashville and surrounding territory. For several hours the halls of Furman Chemical Laboratory were crowded with people of every age and occupation. The Exhibits were so unique and of such variety as to enthuse even the "hardened" scientist; to those without chemical training the spectacular displays presented the most fascinating mysteries. The interest aroused in the city has gone so far in stimulating an appreciation of chemistry as a practical science, that details of the exhibit are given with the hope that they may be of assistance to other teachers of chemistry in planning similar public occasions.

In the basement, electric furnaces were at red heat; plating baths were depositing; metals were being polished and etched for examination under the microphotographic camera. The repair shop had a sign, "Everything Mended but Broken Hearts."

On the first floor, an extensive display of Welsbach gas mantles was glowing brightly. A collection of isotopes interested advanced students, but the laymen passed them by. In the physical chemistry laboratory, complete equipment for electrometric titration, sugar analysis, radium determination, and high vacuum work attracted attention. Even the molecules performed for the visitors, for an ultramicroscope was a feature of one room.

On the second floor the analytical laboratories were making determinations of "everything under and in the sun." A miniature sulfur well was in operation. Both the Junker and Bomb calorimeters were competing with each other for speed

and accuracy on analyses of gas and coal samples. Many other industrial processes were represented in laboratory operation. The organic laboratory carried as its motive, "Products of the South-Corn, Coal, Cotton." Starch, sugar, and syrup manufacture; the diversity of corn-cob products; the uses of corn oil; the different types of distillation; these represented the first C. Miniatures and specimens from the manufacture of coal gas, tar, intermediates, dyes, drugs, flavors, etc., illustrated the second C, Bakelite and saccharine were prominent in this group. For the third C, a textile exhibit, cotton in all its stages of growth, cotton seed oil and its many products, made the public aware of how close chemistry was to many familiar objects of daily life. On the third floor the freshmen chemistry students did the honors. For once the laboratory was admittedly a playhouse. Each student chose that chemical "stunt" which to him seemed most thrilling and for the entire evening the smoke rings, the explosive mixtures, the gay solutions, and dozens of other spectacles were carried on continuously as the citizens filed by. And each freshman, finding for once some simple soul that knew less chemistry than he, explained his particular dramatic scene with a dash and swagger that was really inspiring.

In the auditorium continuous motion pictures were shown, three industrial films being used.

The Open House was under the direction of a general committee from the Alchemists Club, of which J. H. Folkerth is president. A faculty group cooperating consisted of Dr. J. M. Breckenridge, Director of the Laboratories, Dr. A. W. Ingersoll, Dr. L. J. Bircher, Dr. F. L. Conover, and Professors W. P. Fishel, E. G. Haas, R. B. Isley, R. C. Carlowitz.

BOOK REVIEWS

Aniline and Its Derivatives, by P. H. GROGGINS, B.S., D. Van Nostrand Company, New York, 1924. vii. 256 pp. 23.15.5 cm. 29 illustrations.

This book presents a detailed account of the manufacture of aniline and some of its most important derivatives, together with a description of its physical and physiological properties. Its real purpose is, however, much broader. The author states in the preface that "the technique in the production of aniline has been used as a vehicle for presenting to the reader the business of plant chemistry."

Types of apparatus and operating conditions are described in detail, so that the reader may, with a little imagination, apply the information to other processes as well. The inclusion of cost data and an extended discussion of costs and operating efficiencies add greatly to the value of the book.

The work should be of great assistance to the advanced student of industrial chemistry, and particularly to the beginner in the chemical industries, as a means of bridging the gap between the usual text-book knowledge and actual plant conditions.

Textbook of Cellulose Chemistry, by EMIL HEUSER, translated from the Second German Edition by CLARENCE J. WEST and GUSTAVUS J. ESselen, Jr. McGraw-Hill Book Company, Inc., New York.

In this book, Dr. Heuser has made an eminently successful attempt to correlate and explain the derivatives and reactions of cellulose on the basis of its formulation as an aliphatic alcohol and a polymer of anhydrocellobiose. He has assembled the scattered and apparently unconnected facts in a concise and readable manner, so that they may be easily understood by one who is not a specialist in this field.

The only disappointment is that the combination of anhydrocellobiose units is explained on the basis of partial valences. It is to be hoped that some more satisfactory explanation may be found. On the whole, the work is an excellent presentation of a difficult subject. The translators are to be congratulated for making it available to English-speaking readers.

UNIVERSITY OF MARYLAND.

GARDNER.

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Entered as Second-class Matter, January 31, 1924, at the Post Office at Easton, Pa., under the Act of March 3, 1879. Acceptance for mailing at special rate of postage provided for in Section 1103, Act of October 3, 1917, authorized January 31, 1924.

Vol. I

September, 1924

EDITORS' OUTLOOK

No. 7

As we look ahead to the coming school year, we are deeply concerned · as to how THIS JOURNAL can be of the greatest value to the teachers of Chemistry. The suggestions which seem to stand out as the most promising are the three following:

1. Each issue of THIS JOURNAL to contain abstracts of articles on chemical education found in other Journals.

2. To run a series of articles on the Application of Educational Psychology to the Teaching of Chemistry.

3. To make THIS JOURNAL an International Journal of Chemical Education.

Suggestions (1) and (2) were given in the June issue and sufficient favorable comment has been received to warrant their adoption as soon as an organization can be completed for their proper execution. Suggestion (3) calls for more careful consideration. There seem to be advantages and also disadvantages in such a project.

There are definite indications that an international journal is desired. This has not only been voiced by teachers of this country, but we have had two such requests from foreign countries. THIS JOURNAL already has subscriptions in five different nations, and therefore in a sense might be considered international. On the other hand, no publication can be considered as truly international until, at least, it contains articles whose authors are from these countries. Foreign contributions have already been offered. Chemistry teachers of this country would be much benefited by reading about the chemical educational movements in other countries, and vice versa.

An international journal should not be a chemical lesson quarterly,

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