[ 529 1 
arteriarum membrana, ita tamen adhxrentibus fibris 
carneis, uc paflim calcuiofe fquamx duftubus tranf- 
verfis infcriberentur. Nihil tamen hie petrofi. In 
omnibus arteriis corporis prxdura et figurata teretia 
fanguinis craflamenta, fuo canali tamen minora. 
4. Veficula fellea flava bile vix amara plena, et 
calculis ad viginti, exiguis, angulofis, quorum unus ita 
obfidebat oftium duftus cyftici, propius paulum cho- 
lidocho, quam prima cyftici valvula, ut bilis, contra 
quam folet, ex veficula premendo expelli non poflet. 
Dulcedinem in bile, quando in calculos coivit, pie- 
rumque reperire foleo* 
Hxc fere fiierunt, quae obfervationem mererentur, 
et demonftrant arteriarum internam membranam ab 
i&ubus repetitis cordis tandem partim indurefeere, par- 
tim inter offificata fpatia rumpi, fie debilitari truncum 
aortx, et ad aneuryfmata reddi pronum. Demonftrat 
etiam in ipfo fanguine ubique terram veram calculo- 
fam circumvehi, nec in renalibus folum viis deponi, 
fed ibi hxrere et congeri, ubi ruptx funt leviflimx 
membranx vaforum, et adtra&io terrearum molecu- 
larum ad afperas inxquales fuperficies major eft. 
XX. A Letter from Mr . David-Erskine Baker 
to the Preiident, concerning the Property 
of Water Efts in fipping off their Skins as 
Serpents do . 
1 r , London , May 13. 1747. 
S feveral little Particularities in the 
Production or Changes of Animals* 
may be found of confiderable Service to aflift us 
Read May 14, 
1 747 - 
A 
111 
