CHEMICAL LAMB. 



in the larger will afcend, and while the latter ^efcends the 

 fornner williifcend, which for fome particular piirpofes may be 

 more convenient than the arrangement before defcribed." 



Mr. Woolf then proceeds io defcribe various other modifi- 

 cations of his invention, and points out means for applying his 

 improvements to the working of lleam-engines already con- 

 ftiucted and now in ufe. It is obvious that the advantages of 

 this difcovery promife to be very cuntiderable, and I ftiall take 

 the earliefi opportunity of communicating the facls as they 

 {hall be brought forward in pradice. 



VII. 



Defcripiion nf a Chemical Lanijjy zvith double concentric Wicks» 

 Communicated by Mr. Frederic Ac cum. 



©efcription, &c. J[ HOSE who are familiar with Cheraiftry will readily allow, 



of an improved , ,. , • • i i n i \ • \ r i • > i 



chemical lamp. ^"'^^ °"^ "^ ^"^ prnicipal obltacles which frequently impede the 

 progrefs of the young chemifi in the profecution of his fcience, 

 is the want of proper apparatus : he is at a lofs to feled from 

 the number of inftruments difplayed in the ledures of his 

 teacher, thofe which are calculated for rendering, in his ozun 

 apartment, the moft important truths of the Icience legitimate 

 by experiment. 



It muft naturally be fo, as long as chemifts are anxious to 

 exhibit a variety of coftly and complicated apparatus, and con- 

 tinue to pay that frivolous regard to Jlioiv which charadterifes 

 fo many public leftures; and as long as the ftudent is told in 

 the inlrodudory lellbn, that the fcience cannot be learned but 

 in the laU^ratory, fitted up with furnaces, frills, bellows, water-- 

 baths, fand-baths, !>;c. It is true indeed, that many chemical 

 phenomena cannot be accurately obfcrved without the help of 

 jnftrunients calculated to airift llie imperfe£lion of our fenfcs ; 

 but it is etjually true, that many of the brilliant apjiaratus which 

 are daily difplayed in the laboratories of teaching chemifis, 

 as inftrumenls of refearch, ferve more to divert tl,ie attention 

 of the auditors, than to elucidate the fundamental truths of the 

 fcience. 



The modern proceffes of philofophical enquiry differ fo much 

 from what they formerly were, and the inftruments of experi- 

 ment 



