CONTENTS. 



Extract from a Report made to the Royal Instkution on 



Mass}:\'s Sounding Mac/line, March 4, I8\i. .. gi 



On the Prtparatiom of Gold lately employed medicinally. 



Mr. Hume's Rnnarks on Ids Test for Arseiiic. 105, 294, 431 



Chemical Researches on the Blood, and some other Animal 

 P^'"ds 109,181 



An Attempt to determine the relative Quantities of the 

 constituent Parts of arlifcial Curlonate of Lime. 117 



Some Particulars rt^specting the arithmetical Powers of 

 Zerah Colrur-n, a Child under Eight Yecasofjge. 1 ly 



On the Existence of Cuoulchouc in the Asclepius rince- 

 toxicum , J 53 



A Memoir upon the Organs nf Absorption in Mammferous 

 Animals. 1 26 



On the Prodiictirm of Sugar from the Starch of fi^^heal , atid 

 of Potatoes, by the Agency of Sulphuric Acid. . . 134 



On the Barometer j3g 



A Neiv Table of the Qunntities of Acid in Sulphuric Acid 

 of different Densities, constructed for the Use of Manu- 

 facturers; being the Result of Experime?its made with 

 the strongest Sulphuric Acid of Commerce. The specific 

 Gravities taken at the Temperature of 60°. .. l6l 



A Correspondence luHwcen Dr. Bostock and Dr. Marcet, 



07? the Subject of the uncumbined Alkali in the Animal 



.Fluids Ijg 



Br. RoGUT in Reply to Mr. Hu^3E on his Test for Ar- 



•^^'-^'c ]?9 



Dn Sir Humphry Davy's lote Proposal for improimg the 

 Arts of bleaching Li/icn and Cotton Cloth by substituting 

 the Oxymuriate of Magnesia for the Oxymuriate of 

 Lime in the blraching Piocest ; with some Observations 

 in Reply to an Artick in the Philosophical Magazine for 



J^i"(^ ., 190 



An Attempt to analyse Silica. ... 20 i 



