Accounts of Bonis, «.y 



tl^lml fon,et!m« blow contrary to the dlreaion of the genera. wi„<,. It is by virtue of 

 the fame pr,nc,p!e, that the refonant vibration, excited laterally in the extren,ity of an or- 

 £an.p,pe ,s comn^un.cated to the whole column of air contained in the pipe itfelf. 



From the fame principle, the author deduces the augmentation of force which found re- 

 ceives .n corneal divergent tubes, compared with thofe of a cylindrical form. On this ocea- 

 f5on he pomts out the remarkable differences which appear to take place between t r o- 



r:;::r:;hirr -""-" - - -'" -' ''- '-- -'^-°- p— ^^ 



re!l-Z ^h''"'"' ^""" y^'"" "'''" '"^"^"' experiments which he has made to de- 

 tetmrne the convergence and velocity of the fluid filaments which prefs forward to iffue 

 out of a refervoir by an orifice through a thin plate. He prove,, by a very clear x^ri 

 ment, that the contraclion of the vein is made at a greater Lance fL th o fi e /nder" 

 ftrong than under weak preffures. He explains, why in a right-lined orifice, the fides 

 rh, contraaed ven> correfpond with the angles of the orifice and the angles with the fides 

 He exam.nes the expenditure through a tube, the extremity of which is thrufi into the re- 

 17Z 'yti 'x;"6 "' '° '" ""'"^ °'^°''' '" ^^^ ^^™°- °f "- ^-'^-y of Sciences 



The Commifl-aries of the Inftitute appointed to examine this work of Citizen Venturi 

 without undertaking to decide refneainff -,11 ,!,» o r • r,- . ^"■"^<^" * entun, 



_ ,., r , " " ^ relpetting all the applications of his principle, give him full 



The I %'ZT 1' '^^""'^ '" '^^ '''^P'^y^^ '" "- -no- experimental urfc 

 The author himfelf is indeed fufficiently candid to admit that every thing of thil ^Lure 

 vhich IS not confirmed by direft experiment, ouglit to form a fubjed of Mon and e„ 

 quiry. .< I have not " fays he, page 9. " infifted upon theoretical confideratlon except 'fj: 

 far as they conabine with the fadis, and fo far as it was neceffary to unite thofe f a d s fn ^ 



theory, and confi.ler my propofitions fimply as the refult of experiment " 

 There isno doubt but that the whole work will tend to confirm the reputation of its au- 

 thor as a fkjiful expenraemalift, and tnliglitened obferver. 



Confiderations on the Doarine of Phlogifton and the Decompofition of Water Bv Tofenh 



Prieflley. LL. D. F. R. S. &c. Philadelphia printed, 1796. ^ ^ ^ 

 Obfervations on the Doarine of Plilogifton and the Compofition of Water. Part If Br 



Jofeph Prleaiey, LL. D. F. R. S. Philadelphia printed, 1797. ' 



Two Leaures on Combuftion. Supplementary to a Courfe of Leaures on Chemiftrv 

 read at Nafiau Hall containing an Examination of Dr. Pricftley's Confiderations on the 

 Doarine of Phlogifton and the Decompofition of Water. Ey John Maclean ProfefTdr 

 of Mathematics and Natural Philofophy in the College of New Jcrfey. Phihdelnh!-, 

 printed, 1797. •* • "^'inua 



As I hope to give a fuller account in future of Dr. Pricrtley's obfervations in favour of 

 the old clKmical fyftem, I (hall for the prcfcnt content myfclf with announcing the titles 

 of the three lalt works. ^ ' 



'^ Tlic 



