522 Scientific News. 



SCIENTIFIC NEWS, AND JCCOUNT OF BOOKS. 

 Lantern Pinions of Glafs for Mlll-tvork. 



V>>ITIZEN MOLARD has communicated to the French Inflitute an acoount of the ad- 

 vantages of making the trundles in lantern pinions of glafs,' to work againft the hard wooden 

 teeth of wheels in mill-work. The trundles are fet in die fame manner as thofe of iron, 

 only taking the neceflary care which the nature of the materia! muft require. A pinion of 

 this kind, in which the trundles were two inches in diameter, did not undergo the leaft wear, 

 or alteration of the furface of the glafs, in 1 8 months' ufe ; and the wooden teeth had loft 

 about one-twelfth part of an inch. Iron trundles wear out the teeth in about four months, 

 and load the work with much more friftion. The kinds of glafs which were tried, were 

 green window-glafs, white fheet-glafs, and the white glafs for goblets (gobictrle). Ihis lafl 

 was the hardeft and beft. The inventor, Cit. Renaut, of the department of La Meurthe, 

 thinks bottle-glafs might be of good fervice. He does not blow the trundles, but makes 

 them folid. It is probable, that with us the glafs of wine bottles might be the cheapcft, and 

 moft valuable for its hardnefs and tenacity, if it can be eafiiy wrought to the figure by the 

 workmen who are employed upon it. — Decade PhUof. No. 5, l^ear VII. 



Itfllttite of the Llgurlan Republic. 



THE lately eftablifhed Inftitute of the Ligurian Republic is compofed of 72 members, of 

 which 36 are refident, and 36 aflbciates, inhabitants of the republic, divided into two clafles, 

 and each of thefe into three feftions. 



The firft is the clafs of mathematical and phyfical fciences, of which, the three fe<fl:ions are: 

 I. Agriculture, commerce, and manufactures. 2. Nautical fcience, matliematics, natural> 

 philofophy, and natural hiftory. 3. Chemiftry, botany, anatomy, medicine, and furgery. 



The fecond clafs includes (moral) philofophy, literature, and the fine arts ; of which the 

 fediions are : 1 . The art of reafoning, and analyfis of the operations of the underftanding, 

 grammar, eloquence, and poetry. 2. Politics, hiftory, and antiquities. 3. Arts of defign. 



On the 14th Brumaire (Nov. 4) the Executive Diredlory of the Republic repaired to the 

 Hall of Seffion of the Inftitute, and the eftablifhment was opened by the formality of pro- 

 claiming tlie members, &c. after wliich the Inftitute proceeded to choofe their prefident and 

 fecretaries, and to organize their future labours. 



. Inflitute of Cairo. * 



THE learned men who accompanied Buonaparte in his expedition have formed a national 

 Inftitute at Cairo, compofed of four claffes, each confifting of twelve members. They hold 

 their meetings on the firft and fixth day of each decade. ^ 



The names of the members of each clafs are as under : 



Clafs I. Mathematics. Andreofly, Buonaparte, Coftaz, Fourier, Gerard, Lepere, Leroi, 

 Malus, Monge, Nouette, Quefnot, Say. 



* From the Magazin Encyclopedlcjue, IV. 552. Nivofe VII. 



Clafs 



