6B 



CURIOUS PROPERTY OF Tlftf TOAD. 



Prf-rious trial piece, and let it stand with the top only covered for a winter 

 recommended. , 



at I Post. 



Requirescare J t |, ns before been observed, that the excellence of the 

 work depends on its having doe compression, as well as be- 

 in*^ of proper soil. If the compression be not perfect, al- 

 though the soil be good, the walls will be unsound ; and 

 unfortunately it so happens, that when a wall is built and 

 badly rammed, its imperfection cannot readily be observed ; 

 and farther, the defect is likely only to be found but by its 

 failure. Fience arises the greatest bar to its general intro- 

 duction ; for, as it requires considerable labour to build a 

 wall, it requires exertion to do it in proper season ; and if 

 the labourer be employed to do the work by task, it be- 

 comes his interest to get oil and do it slightly, and if 

 done bv dav, it will not advance so rapidlv ; consequently, 



and attentive in cither way, it will require great attention tiom a careful 



overlooking, overlooker. 



The saving in From the foregoing comparative statement of pise against 



expanse solely brickwork, persons unacquainted with building are inclined 

 in the walls. 



to suppose, that the whole expense of the building will be in 



proportion thereto ; contrary to this it only effects the wall- 

 ing, — the roof, floor, &c, remaining the same as before, 

 excepting as it may reduce the quantity of bond timber and 

 lime used in plastering the inside ; this latter is less than 

 when plastered on brickwork, the face of the wall being so 

 much truer than brickwork. 



A working drawing, on a scale of one inch to a foot, is 

 left with the Society, for the inspection of any person in- 

 clined to construct the apparatus. 



XIII. 



Curious Property of the Toad. Communicated by a Cor- 

 : , respondent. 



• To Mr. NICHOLSON. 



SIR, 



^MONG the many curious accounts that I have read of 

 the 'load, 1 never met with the following fact. 



A person 



