of Salts and Saline Subfiances* 3 
and Regularity, wherewith-, after being fe« 
parated by Difiblation, they come together 
and re-unite under the -Eye, when put in 
Action by certain Degrees of Heat, in Con¬ 
figurations appropriated to each of them 
respectively, and with a Constancy that is 
furprifing. 
That particular Notice, wherewith the 
Royal Society was pleafed to honour 
thofe Experiments *f*, encouraged me to 
profecute them with all the Care in my 
Power, to minute down every remarkable 
Circumftance in the Procefs, and to make 
faithful Drawings of each Configuration. 
Much has been already published by fe- 
veral curious Obfervers concerning the Cryf- 
talizations and regular Figures of Salts, 
and none I hope will imagine I am hereby 
endeavouring to deprive them either of their 
Difcoveries or their due Praife. But I pre- 
f After many repeated Examinations of Salts and Saline 
Subftances by the Help of Glades, in the Winter of the Year 
1743, I had £ h e Honour twice of entertaining the Royal 
Society with a View of their Configurations, which were 
then thought fo extraordinary, that very many of that illus¬ 
trious Body came often afterwards to fee them more at Lei- 
fure at my Lodgings; and in the Year 1744, Sir Hans 
Sloane, Bart, late Prefident of that Society, was pleafed, 
at the Recommendation of his worthy SucceiTor Martin 
Folkes, Efq; and of the Council of the faid Society, to 
bellow on me the Medal cf Gold, annually prefented (as 
the Donation of Sir Godfrey Copley, Bart, of which Sir 
Hans is the only furviving Truftee) to whomfoever of their 
Members lhall be deemed to have produced the moll extra** 
ordinary Difcovery during the whole Year. 
fume 
