SECTION II. CHEMISTRY. 23 



saturation of spirit of antimony by different substances has blanks 

 left for the quantities. 



pp. 106, 107, other chemical experiments. Note of composition 

 of fusible metal " which in summer will melt in the sun," with the 

 (erroneous) remark that tinglas is more fusible than tin. 



pp. 108 112, chemical experiments chiefly on preparations of 

 antimony and scoria of regulus. Some of these (e.g. p. Ill) are 

 marked with an N in the margin. 



p. 113, action of distilled liquor of antimony on salts of lead, 

 iron and copper ; action of heat on tartarised antimony. 



p. 114, action of spar on distilled liquor of antimony, vinegar, 

 and aquafortis, and of salt from clay of lead mines on do. ; action of 

 nitre on antimony. 



pp. 115, 116, action of oil of vitriol on lead ore, and of an anti- 

 monial sublimate on several substances. 



pp. 117 120, experiments with a substance to which the name 

 " ven. vol." is given. 



p. 121, note, that on May 10, 1681, and on the 14th and 15th he 

 comprehended sundry alchemical names. This note has been 

 scratched out, apparently in consequence of its having nothing to 

 do with the subject of the other notes, but it is not certain that the 

 foregoing experiments have not something to do with it. 



p. 122, another note, that on May 18 he completed the solution 

 of the alchemical symbol of the caduceus, followed by experiments 

 on June 10 on sublimation of green and blue vitriol with salam- 

 moniac and the resulting sublimate with lead ore. Perhaps these 

 experiments on sublimation were designed to test his interpretation 

 of some alchemical symbols. 



pp. 123 sqq. to 126, account of experiments in May and June, 

 1682; on sublimation of some salts with salammoniac, and some 

 metals and alloys with the same, and with antimony. 



pp. 127 to 130, June 26, 1682, and July 4, 1682, account of 

 experiments on obtaining regulus from mixture of lead ores, anti- 

 mony and bismuth ; and others similar. 



p. 131, experiments on the action of various reguluses with 

 spirit (1 of salt). 



pp. 132 4, other experiments on sublimation the date, Tuesday, 

 July 19, is given on p. 133 ; this must have been in 1683. 



pp. 135 sqq., Feb. 29, 1683 4. An experiment in which he 

 prepared the chlorides of mercury. 



