iianne^ of mahhig Kumis, 1<^7 



JifTociated for the exprefs purpofe of exploring philofophica! 

 Jacls, will ever lend a ready hand to feparate the fine from the 

 drofs ; and, T doubt nrtt, Will by their labours give form and 

 folldity to the ftrudure for which I have humbly endeavoured 

 to colleft a few materials. 



I intended, before concludiiig thefc reitiarks, to offer a fevi*- 

 experiments for the confideration of the Society, which, if 

 properly cJondu6ted, would, I perfuade inyfelf, furhifh direct 

 evidence of the gravitating power or property belonging to 

 heat in common with other kinds of matter: I confider the 

 point as eftablifhed by the arguments already advanced, but 

 I mean to fay, that, by certain experiments, (if I have been 

 i-Hider no millake in the reafoning that led me to frame them) 

 its abfolute weight, in certain fpecific cafes, may, I think, be 

 afccrtained; but having run the prefent eilav to a greater 

 length, and encroached further upon the time (;f the Society 

 than was perhaps proper, I (hall referve them for a fupple- 

 ment, which I may offer hereafter, or pertmps make them 

 the fubje6t of a future effiy. 



XXI. AccQiint of the Marnier in ivhich the Tartars and KaU 

 muks make their Kumis, or fermented Mare's Milk *. 



JL AKE of mare's milk of one day any Quantity; add to 

 it a fixth part of water, an eighth part of the foufefl cow's 

 milk that can be got, but at a future period a fmaller portion 

 of kumis will better anfvver the purpofe of louring ; cover the 

 rellel with a thick cloth, and fet it in a place of mcxlerate 

 warmth, leaving it to reil for twenty-four hours ; at the end 

 of which the milk will have become four, and a thick fub- 

 flance gathered at top : then with a flick, made at the lower 

 end in the manner of a churn ftaff, beat it till the ttiick fub- 

 ftance above mentioned be blended intimately with the fub- 

 jacent fluid : let it reft twenty-four hours in a high narrow 

 veffel like a churn. The agitation muft be repeated as before, 

 iill the liquor appears to be perfectly homogeneous; and in 

 Ihi^ ftate it i;? called kumis (or koumis), of which the tafte 



* From Efons S'avry of the Turkijb Empire. 



oughl 



