NEW BOOKS, &C ? $^0 



Criterion of Life. 



Pr. STRUVE has contrived an apparatus which is men- Criterion of 

 tioned in the foreign Journals, but not defcribed. The Lif «* 

 pbjeel of its application, is to fhew by means of galvanifm, 

 whether the appearance of death be real; a purpofe fuf* 

 ficiently interefting to every human being, who has for a 

 moment reflected on the fatisfa&ion which recovery from, 

 apparent death muft give to the friends and jelatives of thQ 

 individual fuppofed to be dead | and on the ftill more im- 

 preflive and dreadful incident of recovery after burial. Our 

 galvanic and anatomical philosophers will find no difficulty in 

 applying this powerful agent to fo good a purpofe, in whicl* 

 the learned Doctor has the merit of taking the lead. 



Mr. SESSKEN who has fuccefsfully laboured in the con- 

 duction of a reflecting telefcope of thirteen feet focus, ha* 

 lately fupplied the Obfervatory at LUienthal, with two mirrors 

 of fifteen feet focus and eleven inches aperture, which prove 

 to be excellent, and bear the magnifying power of 200Q 

 very well, on the proper objects, and at fuch feafons as a,re f]t 

 for making obfervations of this nature. 



Numbering of Hovfes, 

 A NEW mode of numbering houfes has lately been Numbering of 

 adopted at Paris, which is attended with much advantage, 

 and deferves to be followed in this country. Over each door 

 the numbers are painted in large diftinct characters, and iri 

 confpicuous colours; they 3re generally either brown or 

 red, on a yellow ground, furrounded by a blue fquare ; but 

 the principal iingularity, which is the object of this notice, 

 is, that all the odd numbers are placed at one fide of the 

 Irreet, and the even numbers at the other ; by which means, 

 may be feen at once on entering the ftreet, at which fide of 

 the waj the houfe is, which is fought for; by which much 

 time may be faved, not only by its making it unneceflary ever 

 to crofs the ilreet more thai) once, but alfo by its always 



preventing 



\ 



