Bacteria, especially as they are related to the economy of nature, to industrial processes and to the public healthG.P. Putnam's Sons, 1899 - 348 pages |
Common terms and phrases
action agar alcohol anaërobic animal anthrax antiseptic antitoxins apparatus appear Bacillus coli Bacillus typhosus bacteriology become blood body broth butter capsule carbonic acid cause cells cent cheese chemical cholera coli colonies colour containing cream cultivation dairy diphtheria diplococcus disease disinfection effect examination fact favourable fermentation fever filter filtration flagella flask fluid gelatine germs glycerine grow growth heat Hence incubated infection inoculation isolated Koch Koch's lactic acid large number leprosy medium membrane method micro-organisms microbes microscope milk moist motile nitrates nitrogen nodules number of bacteria obtained occurs ordinary organic matter oxygen oysters Pasteur pasteurisation pathogenic plate poisonous pollution present produce Professor pure culture putrefactive quantity readily result ripening saprophytic serum sewage sewer air soil solution species spirillum spores staining sterilised substance surface temperature tetanus tion tissues toxins tube tubercle tubercular tuberculosis typhoid udder vaccine various virulence whilst yeast
Popular passages
Page 164 - Papilionaceae it was not so. In the case of these plants, that of peas for example, it was observed that, in a series of pots to which no nitrogen was added, most of the plants were apparently limited in their growth by the amount of nitrogen which the seed supplied.
Page 316 - ... the activity of a number of varieties of bacteria, some of which belong to well-known species, and are of ordinary occurrence and wide distribution, the most important being the streptococcus (enteritidis) and Proteus vulgaris.
Page 206 - The filters consist of large cylindrical vessels divided by horizontal perforated diaphragms into five superposed compartments, of which the middle three are filled with fine clean sand sifted into three sizes, the coarsest being placed in the lowest, and the finest in the topmost of the three compartments.
Page 313 - ... 6. Leprosy, in the great majority of cases, originates de novo, that is, from a sequence or concurrence of causes and conditions dealt with in the Eeport, and which are related to each other in ways at present imperfectly known.
Page 161 - The more widely this wasteful system is extended, recklessly returning to the sea what we have taken from the land, the more surely and quickly will the finite stocks of nitrogen locked up in the soils of the world become exhausted. Let us remember that the plant creates nothing ; there is nothing in bread which is not absorbed from the soil, and unless the abstracted nitrogen is returned to the soil, its fertility must ultimately be exhausted.
Page 89 - Discharge, broad irrigation means " the distribution of sewage over a large surface of ordinary agricultural ground, having in view a maximum growth of vegetation (consistently with due purification) for the amount of sewage supplied.
Page 312 - Though in a scientific classification of diseases leprosy must be regarded as contagious, and also inoculable, yet the extent to which it is propagated by these means is exceedingly small. (4) ' Leprosy is not directly originated by the use of any particular article of food, nor by any climatic or telluric conditions, nor by insanitary surroundings ; neither does it peculiarly affect any race or caste. (5)