234 DISSERTJTION on the 



Two Letters o« Electrical and other Phenomena? 

 addrejfed to Dr Matthew Guthrie, Con/. Aid. F. R. SS. 

 LoND. and Edin. Phyfician to the Imperial Corps of Noble 

 Cadets, and to that of the Artillery and Engineers in St Peterfburg<, 

 by his Excellency M. jEriNUS. 



\_TranJlation from the French. 2 



Dear Si r, 



I ACKNOWLEDGE the pleafure I have received in perufing 

 your paper on the Northern Climate ; and certainly it would 

 be difficult to give, with more method and intelligence, a clear 

 and diftindl idea of the peculiarities of our climate, quod malus 

 Jupiter urget, and which diftinguilh it from the other countries 

 of Europe, placed under a more mild and temperate fky. 



I SHALL therefore comply with pleafure, in giving a circnm- 

 ftantial account of the curious fads mentioned in your Differ- 

 tation, as feen and authenticated by me ; and (hall, at the 

 fame time, avail myfelf of your permiffion to communicate 

 the remarks and reflexions I have made on reading your inter- 

 efting DilTertation *. 



The uncommon phenomena alluded to in your paper, were 

 as follow : During the laft weeks of the year 1766 and the 

 firft of 1767, we had conftantly very ftrong froft, with the 



calm, 



• Dr Gdthrie folicitcd the learned gentleman's remarks and opinion on liis paper. 

 M. -Spinus is the oldeft Profedor of the Imperial Academy now alive, having fpent 

 upwards of thirty years in this country ; and as Natural Philofophy was his prufeffional 

 line before called to Court, and his amufement fince, his Excellency is of all others mod 

 able to judge of the peculiarities of our climate, and the fitteft to put the llamp of 

 veracity on this DifTertation, its principal rnerit. 



