44 ©ftfje^ec&anical €mtt» 



was let fall to the bottom. Put this 

 experiment, to be fuccesfiil 9 requires 

 greater care in him that makes it, 

 than the former needs. 



To confirm, and fomewhat to 

 vary this way of Precipitation, I 

 (hall add; that haying made a clear 

 folution of choice Gum Arabic in 

 common water, and poured upon it 

 a little high rectified fpirit of wine, 

 on this occafion there was alfo 

 made, and that in a trice, a copious 

 precipitation of a light and purely 

 white fubftance not unpleafant tp 

 behold. And for further Confirma- 

 tion I diflolved a full proportion of 

 Myrrhein fair water, and into the 

 filtrated folution, which was tran- 

 fparent, but of a high browp colour, 

 Idropt a large proportion ( which 

 Circumftance is not to be omitted ) 

 of carefully dephlegm'd fpirit of 

 wine, which according to expecta- 

 tion made a copious Precipitate of 

 the Gum. And thefe instances I 

 the rather fet down in this place, 

 becaufe they feem to (how , that 



fimple 



