Away from such conveniences, use the following method: Place two ounces of crystals of permanganate of potash in a pan and have a pint bottle of formalin near by.
One and one-half ounces of formalin added to 1 gallon of water is a valuable agent for the disinfection of the skin or septic wounds, but is somewhat painful and irritating to raw surfaces.
The ground under the manure pile should then be disinfected, either by the above-mentioned formalin solution or by unslaked lime thickly sprinkled over the soil.
Formalin has the appearance of water and in the strong solution is poisonous, but when diluted as recommended above it is not dangerous.
Formalin is the commercial name for the 40 per cent solution of formaldehyde gas in water, and is one of the most powerful antiseptic and disinfectants that we possess.
Formalin and formaldehyde gas have been found very efficacious as sanitary agents.
Probably one of the most simple and practical methods of liberating this gas is by means of the chemical reaction which takes place when formalin is poured upon permanganate of potassium.
The label on the large trade package states that Germiletum contains “Formalin 1/2 M.
As illustrating the contradictions which the formulas present: While the wrapper of the “large size” trade package claims that Germiletum contains 3/4 minims Formalin (Formalin is a proprietary name for a 40 per cent.
Formaldehyde (which in 40% water solution forms the formalin of commerce) in milk affords a bright purple colour when the milk containing it is mixed with sulphuric acid containing a trace of an iron salt.
In even moderate doses formalin produces severe pains in the abdomen and has caused death.
The Abdominal Viscera in situ, as seen when the abdomen is laid open and the great omentum removed (drawn to scale from a photograph of a male body aged 56, hardened by formalin injections).
After they have sunk to the bottom, the liquid may be poured off and replaced by formalindiluted with sea-water (for marine plankton), or by a mixture of formalin and spirit.
The most suitable strength of formalin varies with different organisms, but 5 per cent.
Formalin is very cheap and readily obtained, but it is much less suitable than spirit for most Crustacea, as it tends to make them stiff and fragile, and small forms containing much lime, such as Cumacea, may become decalcified.
For Crustacea collected by the tow-net, however, formalingives good results.
In a fresh specimen or one which has been preserved in alcohol or formalin note the raying out of parts of the body from a common centre.
Interior schools should have, if possible, specimens preserved in alcohol or formalin for examination.
For inland schools, specimens preserved in alcohol orformalin must be used.
Small squids preserved in alcohol or formalin can be had of all dealers in biological supplies (see p.
Alcohol is better for the earthworm, but for the other examples formalin is either better or as good, and as it is much cheaper it may well be chosen for the general preservative.
Have also a tapeworm preserved in alcohol or formalin to show the very flat and many-segmented body.
Fishes should not be kept in formalin more than a few months, as they absorb water, swell, and grow fragile.
Specimens to be used for dissection should be kept in alcohol of 85 per cent or in formalin of 4 per cent.
To a little of the residue in a watch-glass or porcelain dish add a few drops of formaldehyd-sulphuric acid, which has been freshly prepared by adding one drop of formalin to 1 c.
The following diluting and fixing fluid is recommended: Formalin 10 c.
The process that I selected as the simplest for a beginner was that of formalin injection, and I went straight from the Museum to purchase the necessary materials.
Some effects of formalin on the serological activity of crustacean and mammalian sera.
Formalin was added to a portion of the supernatant in the amount necessary to make the final dilution 0.
Materials and Methods Specimens were preserved in a solution of one part formalinto eight parts of water.
Formalin caused slight denaturation of some of the proteins, but this effect was complete within a few hours, after which any denatured material was removed by filtration or centrifugation.
The addition of formalin reduces the reactivity of the extracts when they are tested with antisera prepared against "native" antigens and causes changes in the nature of the precipitin curves.
The possibility that some of the serological correspondence is due to the "homologizing" effect of formalin on proteins should not be excluded.
Graphs of precipitin reactions illustrating effects of formalin on antigenicity and reactivity of the extracts.
Formalin is one of the best and safest general disinfectants to use.
One pound, or pint, of formalin will furnish vapor enough to disinfect a room eight feet square and eight feet high, so the amount for a given room can thus be calculated.
Formalin has the additional advantage of not tarnishing metal surfaces, as sulphur does.
Formalin has the advantage, in collecting, of cheapness and of ease in transportation, as a single small bottle will make a large amount of the fluid.
In the field it is much better to use formalin (formaldehyde) in preference to alcohol.
A mixture of formalin and alcohol is favorable to the preservation of markings.
In the museum all specimens should be removed at once from formalin to alcohol.
If left too long in formalin fishes swell, the bones are softened, and the specimens become brittle or even worthless.
Too much formalin makes the specimens stiff, swollen, and intractable, besides too soon destroying the color.
When formalin is evaporated down, a white residue is left known as paraform.
The vapour cannot in practice be generated from the formalin as readily as from the paraform.
Formalin is probably the best gaseous disinfectant which we have, but its use does not, and should not, preclude the simultaneous adoption of other methods.
Formalin is a strong bactericide even in dilute solutions, and, of course, volatile.
Formalin in 1% alcoholic solution was first used by Benario for fixing blood preparations.
This fluid gave good preservation; these specimens had the advantages of lacking almost entirely the irritating odor of formalin and of having pliable tissues.
The skin of those specimens originally injected with formalin was slit in several places and they were transferred to crocks containing embalming fluid (without the formalin).
After a period of many weeks, with two changes of fluid, most of the formalin odor was eliminated and the muscles were sufficiently pliable to be easily dissected.
The preparation is covered with a freshly prepared saturated solution of gentian violet in formalin and this allowed to stain for 30 seconds.
Formalin was squirted into the circulation of consumptives until it was discovered that formalin nourishes the tubercle bacillus handsomely and kills men.
The specimen was then hardened in formalin and still preserves its original aspect.
Specimens hardened in formalin immediately after death; the resulting contraction has slightly exaggerated the irregularity of outline of the entry wound] [Illustration: FIG.
The curing room itself may be freed from the mold spores by the use of such standard disinfectants as formalin or sulphur.
Formalin has been most widely used in milk because it is a most efficient preservative; it is cheap and cannot be detected by the consumer, although it injures the digestibility of the casein.
Then paint with commercial formalin 1 part and water 9 parts and if this causes a burning of any portion of the raw skin wash it off with water.
If formalin is not at hand a strong tea infusion or tannic acid solution will work as well.
The following formula is stated to give satisfactory results in the preparation of sheet rubber, when applied as in the preceding paragraphs bearing on the employment of sodium sulphite: Formula for Use of Formalin (Formaldehyde).
Few estates now use formalin (formaldehyde) as an anti-coagulant.
Formalin being the solution of a gas in water, there is no residual substance left in the rubber to delay drying.
Either formalin or sodium sulphite is of service, but the great objection advanced against the former is its loss due to evaporation while the carts are going to the fields or waiting at the centres.
This may be real or indirectly due to the presence of an excess of anti-coagulant such as formalin or sodium sulphite.
Whatever may be the actual facts regarding the effect of formalin upon the vulcanisation of rubber, when used in minimum proportions, there can be no question concerning its injurious effect if used in excess.
Among the better known agents which have such an effect upon latex, formalinand sodium sulphite (not bisulphite) are the chief.
Allow the mixture to stand 24 hours, centrifugalise thoroughly, pipette off the supernatant liquid to a clean bottle and then add a crystal of thymol or one drop of formalin as a preservative.
If water of condensation is present in any of the culture tubes, it should be removed by means of a capillary pipette before placing the tubes in the formalin chamber.
Remove the tubes from the formalin chamber after the lapse of a week, and dry the exterior of each.
There they were more than naked and fully intact as if basking in a tanning booth in order to get a suntan-only they were ochre and stiff as ceramic vases and floating in formalin or formaldeyhyde.
They entered: internal organs in glass boxes of formalin; brains; an ear with a joining canal; and then there was an entire baby standing there also in formalin and also inside its large glass aquarium.
Woolen Goods and Wool= are injured by being steamed, and hence may be best disinfected by formalin solutions or by formaldehyde gas.
Another method sometimes employed is to sprinkle a five per cent solution of formalin on every other page of the book; but this is rather a slow process.
Carpets= should first be subjected to a gaseous disinfectant, and then be wrapped in sheets wetted with formalin solution and sent to be steamed.
The formalin was in use to the value of 2,000 yen.
One diagram illustrated the development in a particular county of the use of two bactericides, formalin and carbon bisulphide.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "formalin" in a variety of sentences. We hope that you will now be able to make sentences using this word.
