370 dvory Paper.—Manufacture of Glass. 
3. Lathographie Paper. 
eect Lasteryrie has reported to the Society D’En- 
couragement of Paris (under date of June 28th, 1820) in 
favour of the Lithographic paper or cards, invented by 
Senefelder. The card is covered on one or both of its fa- 
CE8 with an argillo-calcareous mixture, which bas the prop- 
Common writing is easily transferred to the labographic 
or papyrographic plate and copies of it taken. The Persian 
ambassador being present with the commissioners at their 
examination of the press, wrote in Arabic a note, of which 
copies were taken. The translation is as follows : 
Mirza Aboul Hassan Kham, ambassador extrao 
from the illustrious court of Persia, residing in the sewed 
city of Paris, the 24th May, 1820 of the christian era came 
_ All that I have seen in Paris, either with respect to the cli- 
mate or to objects of art, surpasses all that I have seen in 
other countries.” 
4. Ivory Paper. 
A Mr. Einsle of London has invented what he calls Ivory 
Paper which is found in regard to hardness, smoothness and 
veneennest to answer as well as ivory in the hands of nsinia- 
ture painters. A premium. of thirty guineas has been assign- 
ed to the inventor by the Adelphi Society in London. — 
8. Manufacture of Glass. 
. -M. Westrumb has found that the salts of potash and so- 
da deprived of their cag of crystalization answer as well 
- ne pure alkali itself in the fabrication of glass. Muriate 
of soda, sulphate of pouibeeat particularly sulphate of so- 
és opin much water. The latter loses fifty eight per 
nt by drying. Twenty four parts of sulphate of sodaare 
oroughh; ‘dried and and mixed with eight parts of powde: 
coal andsixteen of good white sand. The mixture is 
