AGRICULTURAL MECHANICS AND RURAL ECONOMY. 



55 



Mosquito Window Screen. 



The annexed figures represent an improvement in 

 window screens for excluding mosquitos and flies in sum- 

 mer, when a portion of the window is left open for proper 

 ventilation. The inventor is B. B. Webster, of Boston. 



Description. — Fig. 1 is an inside view of a window 

 having the improved mosquito curtain attached, the 

 lower sash being partly elevated in order to exhibit the 

 curtain. B is a roller (moved by a spring in boxes A A) 

 around which the gauze curtain is wound when the 

 window is closed. The spring is indicated by the dotted 

 lines in. fig. 2 (a perspective sectional view) at A. C is 

 a movable bar, that may be easily detached from the 

 sash D, to allow the window to be easily opened when 

 desired, without using the curtain. C C {fig. 2) shows 

 this bar detached. When the window is partly open, 

 the space between the glass and the bottom of the upper 

 sash is effectually closed by some flexible material to pre- 

 vent insects from entering the room in that way. A like 

 insect curtain may be applied to the upper sash, if desired. 

 The common mosquito curtains are fixed to a separate 

 frame, made for the lower sash of windows, which has 

 to be removed, and the curtain frame set in. This in- 

 vention is certainly a neat and convenient improvement over 

 the common kind. This curtain has only its small spring 

 and roller-box B, secured to the window sole by screws, 

 and the bar C, to which the upper end of the curtain is at- 

 tached, clasped upon the lower part D of the sash, so that 

 when the window is raised, as shown in fig. 1, the curtain 

 is drawn up and covers the space, to prevent the ingress of 

 insects. When the window is lowered, the springs in the 

 roller-box wind the curtain by self-action on the roller B. 

 The tension of the springs can be regulated in a minute to 

 suit any window to which a curtain is attached. 



Fig. 1. 



Fig. 2. 



The Way to Transport Logs. 



Mr. W. S. Booth, of Connecticut, furnishes to the People's Journal the following infor- 

 mation, the result of his experience in regard to the best method of transporting heavy tim- 

 ber from remote and difficult localities. In nearly all the easily-accessible localities on the 

 Atlantic border, the forests have been cut down, and now the supply must be taken from 

 those points where great difficulties in the way of transportation have to be overcome, such 

 as mountains, ravines, &c. The method at present in general use is to slide logs down by 

 a hand-spike for one or two hundred yards, or pull them by team and dog-chain. But there 

 is great danger both to team and driver by the latter mode, as the logs acquire increasing 

 velocity in proportion to the steepness of the descent. Mr. Booth's plan is to provide a 

 simple pole of any flexible wood, say five inches diameter and ten feet long, and attach it 

 firmly as a tongue to the log. This tongue may be kept in place by means of a notch in the 

 log and a couple of pins on the tongue, between which the chain is made to pass. The fix- 

 tures for hitching on the team are made in the usual manner. 



In order to load the cart, the axle is placed on a slope, about five feet from the third part 

 of the length of the log ; remove the nearest wheel by pulling out the fastening, and let it lie 

 in a horizontal position, with the end of the axle resting directly on the middle of the hub of 

 the wheel, in the manner shown in fig. 1. Then, by means of a plank, placed on the axle and 



