1803. Ohfervatlofii on the covJiruBion of Gates* 185 



latch, which is executed in caft iron * for tria], 3-4ths of an inch 

 thick. 



K is the catcli belonging to 1, to be made alfo of caft iron, i inch 

 thick. 



L is ahafp with a peg, of which the flud palles through the 

 lower hole, but is too large to pafs the upper hole, and therefore 

 cannot be detached from the hafp : this may be made very ufeful 

 in a fold-yard, Si-c. 



M io part of an oak tree, without the bark ; and fince a well 

 conftru«Sted gate cannot be advantageoudy ufed, without fuitkble 

 pofls, it is neceffary to make fome remarks upon the length, 

 and lubftance of fuch as will anfwer the intended purpofe ; "and 

 as much expence and trouble may be faved, by a proper under- 

 flanding in this ref|je6t, I lliall fubmit the following calcula- 

 tions. 



An oak pod \ o inches fquare and 8 feet long is fufficicntly 

 flrong for the gate F, and it will contain 5I feet of timber, or 

 exa6lly 5 feet 6-j<>^ inches, the value of which muft depend upon 

 the quality of the timber; but for ordinary purpofe"^, the lower 

 part of a tree of thedimenfxons M v/ill make 4 capital pofts for 

 ufe, though t)ieir form may not be thought ornamental, and 

 will contain by cuftomary meafure 194 feet, or exactly 19 feet 

 6rV inches j but the true meafure of the part of a tree M is 25 feet, 

 or exaftly 25 feet 1-/^ inch : this leaves to the purchafcr of round 

 timber, taking in the fap, an advantage in the proportion of 

 about 50 to 39, or upwards of 5 to 4. 



EJl'njiate of gate pojis. 



For 4pofl§ containing 194 feet cuitomery meafure, 

 of moderately good oak (fcveral inches of which, in 

 the length towards the root, is of little orno value ta- 

 ken together, fay at 2s a foot. £ x 19 o 



32 feet of fawing, fay i q* 



.5 2 o 



This being divided by 4 will amount tp los a pod ; which va- 

 lue, though apparently large, will be foon compenfatcd in avoiding 

 the continual chaige of altering and propping infafticient polls : 

 befides, thefe dimenfions exceed the fize of 10 inches fquare, evea 



after 



* The perfedion to which the art of cafting iron is now brought, loads mc t^ 



think, thac a great part, it not the wiiole of the iron work for gates, may be evc- 



cuted in tiiat cheap and cxpccSitinus nuuincv ; unci it is my intention to make thi« 

 the fub]e»il of future expcriijianti. 



