A companion to the United States pharmacopia; . on, F.; JSomull, Sw. The hairs (lanugo) of the seeds. They are simple cells, and consistof nearly pure cellulose. Cotton fibre, though round when still fresh inthe pod, becomes dry and collapsed when gathered, and then presentsa spiral and band-like appearanceunder the microscope. (See figure.)It is one of the most frequent acci-dental foreign substances in ourmounted specimens for the micro-scope, as the air in our rooms almostalways contains small floating par-ticles of this substance, which set-tles as dust on our slides duringmounting. We hav
A companion to the United States pharmacopia; . on, F.; JSomull, Sw. The hairs (lanugo) of the seeds. They are simple cells, and consistof nearly pure cellulose. Cotton fibre, though round when still fresh inthe pod, becomes dry and collapsed when gathered, and then presentsa spiral and band-like appearanceunder the microscope. (See figure.)It is one of the most frequent acci-dental foreign substances in ourmounted specimens for the micro-scope, as the air in our rooms almostalways contains small floating par-ticles of this substance, which set-tles as dust on our slides duringmounting. We have known bits ofthis fibre to have been mistaken forurinary casts, which will, of course,not happen to one familiar with itsappearance. FlG Fibre, magnified. Raw cotton is more or less impure from adhering fixed oil, etc. Tomake it pure and clean it is washed in weak soda lye, then in purewater, and dried. After this purification it absorbs water rapidly, andsinks when thrown upon its surface. It is therefore called 534 A COMPANION TO THE Pharmaceutical Uses.—Cotton is often used in funnels to filteroils, etc., and for preparing officinal waters. Medicinal Uses.—As a dressing in burns, scalds, excoriations, etc. Also as an absorbent dressing to surfaces or abscesses dischargingmuch pus. It is a protective dressing for surgical wounds, and prevents septicmatter from gaining access to the raw surfaces. For this purpose it isoften carbolized. HEMOSTATIC COTTON is made by dipping absorbent cotton in solution of chloride of iron anddrying and picking it. Sometimes alum is also added. One formulaprescribes twenty grams solution chloride iron ( specific gravity),ten grams potassa alum, and one hundred and twenty grams water, withwhich the cotton is saturated. Gossypii Seminis Oleum; U. S. Cotton-Seed Oil. Origin.— Gossypium herbaceum, etc. Description.—See the Pharmacopoeia, page 237. It is a fixed oilexpressed from the cotton seed, and refined
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishernewyo, bookyear1884
