PHYSICAL AND LITERARY. 429 



dram of freili calcined oifter {hell*;, redu- 

 ced to a powder, 520 drams of boiling 

 water. 



2. At the fame time, I poured, upon a 

 pound of the fame calcined ihells, 8 pounds 

 of boiling water* 



3.Tuf:sDAY, at eleven before noon, I 

 poured fifty ounces of the lime-water 

 N°. 2. on nine ounces frefli calcined oifter- 

 fliells ; and, at eight in the evening. I fil- 

 tered, through brown paper, thele three 

 waters, and put fixteen ounces of each of 

 them into a bafon by itfelf ; and, having 

 placed the bafons in a clofet, where they 

 might be pretty free from dufl, I let them 

 fland 19 days. After this, I filtered the 

 feveral waters through brown paper ; and, 

 having coUeded the earthy crufts, and 

 dried them well, I found, that No. i, 

 ^^ afforded very near four grains, No. 2. near 

 ^'12 grains, and No. 3. rather more than. 

 13 grains. 



Although thefe three lime-waters 

 had, at the time they were filtrated, quite 

 loft their tafte; yet, obferving that No. 

 2. and 3. became turbid when mixed 



with 



