i 



CONSENTS. 



V .1. VI. is ilUiftrated with a Reprefentation of a remarkaljle 

 ElcAric Phenomenon obferved in a Thunder-Clond — Americar) 

 plks— An improved 40 Gallon Still, which may be charged and 

 emptied upwards of Seventy Times in 24 Hours — An lmprove4 

 Still, which, even on a large Scaler may be charged and run off 

 Four Hundred and Eighty Times every Tweutyrfour Hours — The 

 UrceoU E!a;i'ca, or Caout-chouc Vine of Suina.ri Jind Pullo- 



Sinang — Mr. Rodman's newly invented Trepanning Inflramen«fc— 

 Jr. Colljer's Filtering Machines— The Mus Burfarins — A Plate 

 illuftrating certain Phenomena-- obferved in the Aiv-Vuu!t of the 

 Furnaces of the Devon Iron-Works— An Air and a Water-Vault 

 for equallfinix the Diicharge of Air into a Blafi-Furnace. 



ISumber 5fXV. Is illuiirated with a Plate illuilrating an unufual 

 horizontal Refraction of the Air — Apparatus employed by iVIr. 

 JiowAUD for trying the JiffeAs of fulminating Mercury. 



Number XXVI. is ill-iftrated with a Plate to explain the Th«- 

 pry of the Evening and Morning Dew-r-Vcfperlilio Plicatus— Aier- 

 curial Air-holder and Brtathmg Machine. 



CONTENTS of NUMBER XXVIL 



I. Obfervatlons on the Straits of Malacca, In regard to Na- 



.ral tjiftory. Geography, and Commerce. By C. Hansel I93 



II. Chemical F.xperiments and Obfervations on the Prepara- 

 tion of Sugar from Vcgetabk' Produ<^'ions found in lusropc, 



JJy Sioi«MUND Frederick. IlEUMiisTADT - - ?o6 



II f." Account of a Serits ot ExpenmentB undertaken with 

 the View of decompofing the Muriatic Acid. By Mr. Wil- 

 liam Henry • - » - - 211 



IV. New Procefs for tinning Copper and other Veflels in a 

 durable Manner. By M. BuscHf nuorp, of Ltiplic 218 



V. Remarks on Di. C UTAH nfr's Mifmoir refpeAing the 

 Queftion, whether Azot be A funple or a compound Body. By 



C. Bertiiollet .' - _ . - . 221 



VI. Defcriptlon of an improved Apparatus for Dldillln';;, 

 I. y which a confider.ible Saving may be made in 1 he Article 

 I ♦ Fuel J and of an Apparatus for the RcAification of Spiiit 



..; Wine. By J. "W. C. FiscHKR - - - 225 



VII. On the Prepardtion of Amber Varni/h, and fhe .Ap- 

 plication of It to different Kinds of ftained Wood. By N'.ls 

 Nystrom, Apothecary of Norrkoping - - 232 



VJII. Comparative View' of fome dangerous Diftafes, fup- 

 pofcd to be occafioncd by Infcfts, wliich prevail in Swedtii, 

 RuflU, Siberia, and the adj»ccnt Countrit J - -39 



