Household bacteriology for students in domestic science

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The Macmillan company, 1913 - Bacteriology - 536 pages
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Page 542 - The purpose of this volume is to present the principles of the chemistry of food and nutrition with special reference to the food requirements of man and the considerations which should underlie our judgment of the nutritive values of food.
Page 209 - ... be preserved for a time by the use of low temperatures; freezing enables them to be kept indefinitely. The use of cold storage has enabled us in modern times to greatly extend the season for certain foods and to carry over surplus from times of plenty to seasons of scarcity. Temperatures from o C. to a few degrees above are commonly used for the cold storage of fruits, vegetables, and eggs, and for temporary preservation of meats. The normal activity of the living cells of the fruit or vegetable...
Page 404 - Some authors believe it to be less than 1 per cent, others estimate it as high as 5 per cent. Swine are most commonly infected in the lymph glands of the neck (scrofula) and in the abdominal organs. Immunity. — The tubercle bacillus does not form true toxins, hence antitoxins cannot be produced. Poisonous substances, possibly of the nature of endotoxins, are formed. They are probably released in large part only upon the dissolution of the bacterial cell. Satisfactory methods of immunization by...
Page 306 - It may be communicated by the sick to persons in health, but even then the poison is not, like that of small-pox, given off from the body in a virulent form, but is developed by the decomposition of the excreta after their discharge. 6. Consequently, an outbreak of enteric fever implies poisoning of air, drinking water, or other ingesta with decomposing excrement.
Page 1 - ... molecular physics to heat, in part; physics of the ether to the remaining topics. Detailed treatment of each topic and of the subdivisions of each topic will be found under the appropriate heading in this encyclopedia, and here will be given only brief outlines of the subject matter of each. Mechanics may be defined as that branch of science which treats of the effects of forces on matter. It is variously subdivided, but a convenient division is into kinematics, which treats of motion in the...
Page 388 - ... after its death. It can also gain entrance to flesh after the animal has been slaughtered. It has been found in the normal feces. Its presence in such is one of the chief arguments for cleanliness about slaughterhouses. During the slaughtering of animals and preparation of their flesh for the market, every precaution should be used to see not only that the animal is not diseased, but also that fecal material is never allowed to come in contact with the healthy tissues. This means the rigid exclusion...
Page 541 - Although the book is highly technical, it is put in popular form and made comprehensible from the standpoint of the farmer; it deals largely with those questions which arise in his experience, and will prove an invaluable aid in countless directions.
Page 539 - Like Gray's Anatomy, Green's Pathology, Parkes's Hygiene, and other classical text-books, this manual is destined to remain for years to come the favorite of both teacher and student, to whose needs it is so admirably adapted." — Philadelphia Medical Journal. "A very useful work for the purpose intended.
Page 50 - A. Cells do not form a surface membrane at once on sugar media, ie do not grow exclusively at the top of the medium. 1. Spores having a single membrane. a. Cells fusing in pairs before spore formation Zygosaccharomyces b.
Page 540 - Cloth, 395 pages, 8vo, $1.60 net The object of this book is to give adequate directions for the performance of certain fundamental exercises in bacteriology. The general directions contain the essential part of the exercise which does not permit of any considerable variation, while the special directions...

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