^^ 



GRIPE FOR CARRIAGES* 



Would be the beft arrangement. When at Liverpool, I met 

 with fuch at the houfe of Mr. Dalton, a very ingenious lec- 

 turer on ele6lricily. The galvanic battery I employed con* 

 fifted of 200 eight-inch plates, which had fufed at the time 

 near five feet of fteel wire ; this communicated a very flight 

 intenfity to the eleftric battery, containing forty feet cofated 

 furface, juft fufficient to convulfe a frog,and although the eleftri- 

 cal battery was in the beft ftate of preparation, we could not 

 fucceed in producing any intenfity as even to affed the tongue* 

 At another period, I (hall do rayfelf the pleafure of tranfmit- 

 ling to you an account of fome ingenious experiments of Mr. 

 Dalton, on eledricity, he finds a cylinder, when exhaufted of 

 air, or when one atmofphere is condenfed into it, will not thea 

 be capable of excitation. 



I am. Sir, 



Your's fincerely, 



C. WILKINSON". 

 No, 19, SohO'Square, 



ix. 



Method of preventing Accidents to Horfes and Carriages, in going 

 down Hillsy by a Gripe or Clafp aBing on the Naves of the 

 V Wheels of the Carriage. By Mr, W. Bowler,* 



SIR, 



JL HE invention I hjlvenow fent you is, I thinks likely to be Apparatus to 

 of great ufe, and I therefore offer a model thereof for your JjP^^^J^*^^^^®^* 

 infpe6tion. In the firft cafe, this cart may be ftopped in an 

 inftant, in going down the fteepeft hill with a load, without 

 Hopping the horfes, by the carter only prefling his hand upon 

 a lever. This plan would likewife be highly advantageous in 

 cafe of a horfe taking fright, as the carriage may be inftantly 

 ftopped by the brace clafping the wheels. It may alfo, with 

 little alteration, anfwer for a broad-wheel waggon with a 

 heavy load. By the prefent method, a coachman, whilft fit- 



* Tranfaflions of the Society of Arts. A bounty of ten guineas 

 was given to the inventor, and the Society have a model. 

 V^L, IX.-— November, 1804. N ting 



