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 |
From inside the book
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Page 3
... material is then placed upon the tray to the left , and the weights are added to the tray on the right . LGENTLING 100000 FIG . 2. - Chemical balances . After the addition of each successive accretion of weight the result must of course ...
... material is then placed upon the tray to the left , and the weights are added to the tray on the right . LGENTLING 100000 FIG . 2. - Chemical balances . After the addition of each successive accretion of weight the result must of course ...
Page 17
... 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 fact that no fixed terms are recognised and adopted by ...
... 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 fact that no fixed terms are recognised and adopted by ...
Page 30
... material creating it is known ; peat , for example , present to quite a harmless extent , will often colour a water highly . The importance of the test , per se , does not seem to warrant any attempt at definite measure- ment . 3. Taste ...
... material creating it is known ; peat , for example , present to quite a harmless extent , will often colour a water highly . The importance of the test , per se , does not seem to warrant any attempt at definite measure- ment . 3. Taste ...
Page 31
... . The test of smell is unreliable , and none may be evident in waters which are considerably polluted by sewage ; it must be borne in mind also that many of the noxious materials which may gain access to a water ANALYSIS . 31.
... . The test of smell is unreliable , and none may be evident in waters which are considerably polluted by sewage ; it must be borne in mind also that many of the noxious materials which may gain access to a water ANALYSIS . 31.
Page 32
Henry Richard Kenwood. the noxious materials which may gain access to a water have little , if any , smell originally . Any coal gas , sulphuretted hydrogen , or ammonium sulphide present , would be detected , and more especi- ally if ...
Henry Richard Kenwood. the noxious materials which may gain access to a water have little , if any , smell originally . Any coal gas , sulphuretted hydrogen , or ammonium sulphide present , would be detected , and more especi- ally if ...
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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.
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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.