Public health laboratory work, including methods employed in bacteriological research, with special reference to the examination of air, water and food contributedBlakiston, 1893 - 491 pages |
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Page 17
... present exists ; the evidence of former pollution by this material in the oxidised , & c . , products of its decomposition ; and the amount to which poisonous metals - if any - are present . Much unnecessary confusion is created by the ...
... present exists ; the evidence of former pollution by this material in the oxidised , & c . , products of its decomposition ; and the amount to which poisonous metals - if any - are present . Much unnecessary confusion is created by the ...
Page 21
... present , we should not effect this by col- lecting the water under circumstances which would show the least amount of dangerous pollution ; but rather , on the other hand , an endeavour should be made to ascertain the maximum amount of ...
... present , we should not effect this by col- lecting the water under circumstances which would show the least amount of dangerous pollution ; but rather , on the other hand , an endeavour should be made to ascertain the maximum amount of ...
Page 28
... present , however , there are many difficulties to surmount before most of the specific germs can be identified as such in a water , and in the main a chemical analysis may be held to be very reliable ; for it is logical to contend ...
... present , however , there are many difficulties to surmount before most of the specific germs can be identified as such in a water , and in the main a chemical analysis may be held to be very reliable ; for it is logical to contend ...
Page 29
... present has settled , a thin colour- less glass tube twenty - four inches long is filled with the clear ( supernatant ) water , and from the appearance of this in the " two - foot tube " as it is called the following physical characters ...
... present has settled , a thin colour- less glass tube twenty - four inches long is filled with the clear ( supernatant ) water , and from the appearance of this in the " two - foot tube " as it is called the following physical characters ...
Page 30
... present will have been precipitated to form a sediment of the hydrated ferric oxide ( i.e. , " rust " ) . A marked green denotes the presence of the vegetable matter containing chlorophyll , which will generally be found to mainly ...
... present will have been precipitated to form a sediment of the hydrated ferric oxide ( i.e. , " rust " ) . A marked green denotes the presence of the vegetable matter containing chlorophyll , which will generally be found to mainly ...
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Common terms and phrases
acetic added adulteration alcohol alkaline alum ammonia ammonium sulphide amount analysis animal apparatus appearance atmosphere blue boiling bottle burette butter c.c. of water calcium calcium carbonate carbonic acid cells cent chemical chlorine coal gas collected colour contain copper created cubic cubic centimetres detected dilute dissolved distilled water employed estimation evaporation flask flour gases gelatine grammes granules hydrochloric acid insoluble iron lime liquid liquor potassæ litre magnesium meat method micro-organisms milk milligramme mineral necessary Nessler glass nitrates and nitrites nitrogen nitrous acid odour organic matter oxide oxidised oxygen permanganate placed platinum dish poisonous metals pollution potassium precipitate present pure quantities reaction reagent residue salts sample sediment silica silver nitrate smell sodium carbonate soil soluble specific gravity standard solution starch sterilised substance sugar sulphate sulphuretted hydrogen sulphuric acid temperature tion total solids tube vapour vegetable washed weight yellow zinc
Popular passages
Page 417 - ... that he had no reason to believe at the time when he sold it that the article was otherwise, and that he sold it in the same state as when he purchased it, he shull be discharged from the prosecution, but shall be liable to pay the costs incurred by the prosecutor, unless he shall have given due notice to him that he will rely on the above defence.
Page 341 - ... diseased, or unsound, or unwholesome, or unfit for the food of man, he may seize and carry away the same himself or by an assistant, in order to have the same dealt with by a justice.
Page 495 - The Diseases of Women. Including Diseases of the Bladder and Urethra. By DR. F. WINCKEL, Professor of Gynaecology and Director of the Royal University Clinic for Women, in Munich.
Page 495 - English Edition, revised and improved. 758 pages. This volume was specially prepared to furnish students with a new text-book of Physiology, elementary so far as to avoid theories which have not borne the test of time and such details of methods as are unnecessary for students in our medical colleges.