March.] FFNCE*. 309 



however, is neceffary in making a good wall, 

 than the building of it after the froft is gone. 

 We have known many tradefmen, who, from their 

 ilovenly difpofition, have fpoiled good materials, 

 even in the midil of fummer weather. The build- 

 ing of walls is generally engaged for at fo much a 

 rood ; and it not urifrequently happens, that thole 

 who perhaps have the management or overfeeing 

 of the work, cannot detecl the imperfection of 

 the execution till it be too late. It is for the fake 

 of fuch perfons that we offer the following obferva- 

 dons. 



In order to make durable walls, it is not only 

 neceffary to ufe lime, but to ufe it under proper 

 circumftances, and with fuch a proportion of fand 

 as is fit to make proper mortal* or cement, other- 

 wife we feek in vain to make durable walls. Pro- 

 perly prepared mortar in a wall is its bond of u* 

 nion, and the pledge of its durability. A wall 

 built with ill prepared mortar is not fo efficient as 

 a good dry-done dike,. 



The mod profitable lime to be ufed for build- 

 ing, is fuch as requires the greateft quantity of 

 fand to a given quantity of time-shells, * to make 

 proper mortar. 



Different limes, although of equal ftrength, 

 rnay require very different treatment in preparing 

 them for building with. We have known a lime 

 T vhich would have fallen to fine powder, on the 



application 

 * Limestone. 



