K. DOMESTIC AND HOUSEHOLD ECONOMY. 497 



latter, when glued with this preparation, as in the formation 

 of the small cylinders for sausages, must be rapidly dried on 

 a hurdle, and then exposed to the light until the yellow glue 

 becomes brownish. These cylinders are then slowly boiled 

 in a sufficient quantity of water, to which two or three per 

 cent, of alum has been added, until all the chromate is dis- 

 solved out; and they are then washed in cold water and 

 dried, and will look very inviting, if white gelatine has been 

 used. Professor Bottger informs us that a similar result may 

 be reached by using a concentrated solution of cellulose in 

 ammoniacal oxide of copper. Thus, if cylinders of unsized 

 paper (as stout Swedish filtering paper) are formed with this 

 paste, and when thoroughly dry are drawn through a parch- 

 mentizing solution (viz., a cooled mixture of two volumes of 

 fuming sulphuric acid and one volume of water), they will be 

 beautifully parchmentized, and after the neutralization of the 

 acid, washing, etc., will present a striking resemblance to nat- 

 ural intestines. 15 (7, 1873, iv., 56. 



COMPAEATIVE ADVANTAGES OF CONDENSED MILK. 



A first-class notice is given by Mr. L. P. Mertain, in a pa- 

 per lately read before the Society of Arts, in Paris, in refer- 

 ence to the comparative advantages of natural and condensed 

 milk. The inconveniences of the former, according to this 

 writer, are first, that the quality is very uncertain, being 

 frequently adulterated to a great degree; second, that its 

 material is altered in the transfer from the producer to the 

 consumer; third, if it is delivered fresh and sweet, it remains 

 so only a limited time, since it is well known that milk alters 

 from hour to hour : for children and sick persons it has not 

 a regular and uniform nourishing quality; fourth, the milk- 

 men trouble themselves very little as to whether their milk 

 has been taken from healthy cows or not, and whether it is 

 of good quality : a large portion, indeed, of that which is 

 furnished in towns and cities coming from diseased animals ; 

 fifth, the uncertainty and the late period of the arrival of 

 the milkman often interferes seriously with the breakfast of 

 the family. 



On the other hand, the advantages of condensed milk fur- 

 nished by established companies are first, that it is pure 

 and of uniform quality; second, that it is condensed in the 



