USE OF SULPHATE OP SODA IN GLASSMAKING. 357 



At a quarter after four he lay down, and appeared in a 

 profound sleep. His pulse was too quick to be counted. 



At half after four he vomited up the paste he had taken ; 

 and some time after he rose, but walked with difficulty, 

 falling sometimes on one side, sometimes on his hind legs. 



He carried his head very low, his eyelids drooped, and 

 he no longer distinguished objects ; at least he struck him- 

 self against the walls and furniture of the laboratory in walk- 

 ing. His nostrils were scarcely sensible to the vapour of 

 ammonia; and his ears heard nothing, for the most sudden 

 noise did not make him stir. 



He had not lost his memory however ; for having put 

 him, with a view to give him some vinegar and water, into 

 the same posture as when he took the paste, he flew into a 

 dreadful rage, as if all his strength had been at once re- 

 newed. From that time the symptoms he had experienced 

 imperceptibly diminished, and about 8 o'clock at night he 

 had recovered all his outward senses, but was still greatly 

 fatigued. The next day he ate as usual. 



Such are the phenomena this animal exhibited: and every Narcotic and 

 one must perceive in (hem the effects of narcotism and in. '"to^'catuig 

 toxication carried to their extreme; whence resulted a sort 

 of delirium. It is probable, that if he had not brought up 

 the greater part of the matter, before it had time to pro- 

 duce its effect, it would have killed him. 



V. 



On the Use of Sulphate of Soda in the Fabrication of ' 

 Glass : hy Mr. Marcel de Serres, Inspector of Arts^ 

 Sciences and Manufactures^. . 



WIy object is to give some account of the attempt made Sulphate of 

 by Dr. Gehleu, to employ the sulphate of soda in g'ass- f° gy^^.i^Jj:!^ 

 works; and as I have had an opportunity of seeing the reding, 

 suits of his experiments, and conversing with him on the 

 subject of those, which he still intends to make, oa the 



* Abridged from Ann. de Chim, vol. Ixxvi, p. 172. 



different 



