CAXXEI. Valliravers, Stockholm, 28. October 
1760: It is a received opinion that all Springs of Salt- 
water, proceed from stratas of Rock-Salt. If the spring 
is not considerable enough for boiling, all that remains, 
is fo come at the Rocks of Salt themselves, which can 
hardly avoid being discovered,, either by tracing the Course 
of the Brine, or by boreing in several Places and Direc- 
tions to the Depth of at least 50, 60, ever to 100 Fathoms. 
The strata’s of salt, which i have seen in Chesshire, and 
which i have heard of in Poland, Hungary, Russia, etc., 
are all of an immense Depth, and often not very distant 
from the surface of the Earth. This being an object of 
great Importance to our own Country, deserves some at- 
tention, some attemps and proper Encouragement..... 
Any Place from and under my natural Souvereign wou’d 
be accepted with Thanks, and the Trust ans wer’d with 
Honour and Zeal. 
CXXXIE. Ch. Bonnet, Genf, 22. Nov. 1760: 
Mr. Le Sage 111), bon mathematicien, dont j’ai eu l’hon- 
neur de vous parler, voudrait faire imprimer un m&moire 
sur les affinites chimiques: La Societe de Berne pourrait- 
elle se charger de le faire imprimer? La piece le merite 
sürement et je souhaiterais que vous en voulussiez juger. 
11) Georg Ludwig Lesage aus Genf (1724—1803), über wel- 
chen auf die einlässliche Biographie seines Schülers Prevost 
(Geneve 1805 80%) verwiesen werden kann. ' 
(Fortsetzung folgt.) 
