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Page 142 - I am aware that chemists may consider this as a terrible conclusion, but it is true, and if the public are guided by percentages alone, they may often be led astray. The real value of a determination of the quantity of organic impurity in a water is, that by it a very shrewd notion can be obtained as to what has had access to that water.
Page 283 - His directions for the preparation of this tooth-powder are, to rub well the lake with the tannin, and gradually add the sugar of milk, previously powdered and sifted: and lastly, the essential oils are to be carefully mixed •with the powdered substances. Experience has convinced him of the efficacy of this tooth-powder, the habitual employment of which will suffice to preserve the gums and teeth in a healthy state.
Page 142 - Every cubic inch of such water would contain 50,000 to 100,000 bacteria, and one drop of it would be capable of exciting a putrefactive fermentation in any substance capable of undergoing that fermentation. For purposes of public health, the human body may be considered as such a substance, and we may conceive of a water containing such organisms, which may be as pure as can be as regards chemical analysis, and yet be as regards the human body as deadly as prussic acid.
Page 119 - ... glycerin, alcohol, amyl alcohol, and ether. Phosphoric acid decolorizes both with salicylic and carbolic acids, and with gallotannic and gallic acids as well. The officinal sodium phosphate, however, hinders the reaction with salicylic and carbolic acids, but not with tannic and gallic acids. For a preliminary distinction between salicylic and carbolic acids the solution is to be treated in abundance with alcohol or glycerin, or with dilute acetic acid, and then tested with ferric chloride. Salicylic...
Page 253 - The following are his conclusions concerning its medicinal properties : 1. Kava-Kava is a sialagogue. 2. Its action on the stomach is that of a bitter tonic; it improves the appetite without producing either diarrhoea or constipation, and perhaps acts as a prophylactic to catarrhal affections of the upper part of the digestive canal. Its taste is agreeable. 3. It exerts a special stimulating effect on the central nervous system ; this stimulation differs essentially from alcoholic intoxication, and...
Page 118 - ... them we may obtain a clue as to which of the acids may be present in a solution. Thus with salicylic acid the reaction is not disturbed or hindered by the presence of acetic, boracic, sulphuric, nitric or hydrochloric acids (all acids in dilute condition), common salt, nitre, glycerin, alcohol, amyl alcohol or ether. It is hindered by caustic alkalies, alkaline carbonates, sodium acetate, ammonium acetate, borax, potassium iodide, sodium phosphate, oxalic, citric, tartaric, phosphoric and arsenic...