462 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



the required want. The supply of intestines soon being ex- 

 hausted by the enormous quantity of pease-sausages manu- 

 factured for the German armies, the necessity arose for a sub- 

 stitute. This consisted of a tube of parchment paper glued 

 together. Millions of these tubes from Dr. Jacobsen's factory 

 were tested by the government, and found to answer the pur- 

 pose admirably. They were even boiled for hours without 

 either the glued seam or the paper itself being injured by the 

 operation. The great value of this material having been thus 

 shown, it will undoubtedly be found equally useful in many 

 other important applications. 6 C, 1871, 125. 



MORTAR FOR USE IN DAMP PLACES. 



It is said that a mortar can be prepared, admirably adapt- 

 ed for plastering walls and roofs in moist localities, by mixing 

 freshly slacked lime and sawdust made from very soft wood 

 (rather fibrous than granular), and using only enough lime 

 to permit the mass to attach itself to the wall without diffi- 

 culty. These two ingredients combined, it is said, form a 

 complete felting, which appears as if impregnated with lime, 

 and so tough that a blow affects only the spot where it falls, 

 without loosening the general mass. 



This mortar is said to be especially adapted for j;>lastering 

 coffer-dam work, the inside of wells, cob-walls, etc. Applied 

 in a layer of a quarter of an inch thick to the boards of an 

 ice-house, against which the ice was densely packed, it was 

 not affected in the least by the moisture. Rooms plastered 

 with this mortar can, it is said, be papered in a few weeks. 

 8 C.Juhj 14,223. 



GLYCERINE CEMENT. 



It is said that the claims of a mixture of glycerine and lead 

 litharge to form a fire-proof cement have not been substanti- 

 ated, but that if gold litharge be substituted instead of that 

 of lead, the desired result will be secured. 12 C, June, 46. 



IRON-SLAG CEMENT. 



A new form of cement, of much value, may, it is said, be 

 prepared by finely pulverizing the slag of iron furnaces, and 

 passing this through a fine sieve. This powder is then to be 

 mixed in a mill with calcined gypsum, to which a variable 



