GELATIN. 333 
gelatus, congealed, or frozen with cold. For making a meat 
jelly: Take half an ounce of gelatin, and dissolve it in half a tea- 
cupiul of cold water. Cut the meat from half « chicken, 
cut up half a pound of veal, and half a pound of gravy 
beef, and put all these into a saucepan, with half a pint 
of cold water, and a little salt. Stand it at the side of 
the fire, and simmer slowly. Put the chicken bones, and 
any bones from the veal, into another saucepan, covering them 
with cold water, and let them boil gently for three or four hours. 
Pour the liquor from both saucepans into a basin, and add the 
dissolved gelatin. Strain two or three times through muslin 
until quite clear, then pour into a mould, rinsed previously out 
of cold water, and put the jelly aside in a cold place to set. 
Calves’ feet, free from bone, yield twenty-five per cent of 
gelatin on boiling, therefore they are well known for affording 
abundant substance for a pure jelly ; but we find that the cost 
of procuring the jelly in this way from the feet is sixteen times 
as much as to use good commercial gelatin for the purpose. It 
is better to add such gelatin to plain good stock (as of chicken) 
than to boil up veal or calves’ feet for the jelly, which of itself 
is poor nutriment. Ordinary jellies can only be regarded as 
dear foods, and the calf’s foot jelly of the shops yields no building 
material at all. 
For milk jelly : Take one pint of milk, half an ounce of gelatin, 
and one ounce of white sugar. Boil up the milk, and add the 
sugar; dissolve the gelatin in a little milk, or water; heat this 
up, and put it with the sweetened milk ; cool a little, and pour 
into a wetted mould in a cool place ; turn out whenset. Vaseline 
jelly, or petroleum jelly, makes an admirable intestinal anti- 
putrescent, and destroyer of microbes within the digestive tract ; 
it is also demulcent in some way, even although taken up but 
sparingly as a food. Indeed, Dr. Hutchison contends that 
the petroleum when swallowed in this form can be discovered 
finally in the foecal excrement which passes out of the bowels. 
Ii made into an emulsion with cream, the petroleum is foundito 
defeat alcoholic, lactic, and butyric fermentation, preventing 
any self-poisoning by noxious matters absorbed into the blood 
from the bowels. The purest petroleum is white vaseline. _ 
Tea jelly and coffee jelly, though affording but little nourish- 
ment, are of a revivifying character, and frequently of service 
to the invalid. For the former: Soak half an ounce of good 
