132 REPORT— 1853. 



closed, and changed by an electro-dynamic coil, which is moved by means of a cur- 

 rent communicated from a distant station, through a single wire. Thus what ia 

 mechanically effected at the distance of about half a mile, may, by the proposed ap- 

 paratus, be effected at any required distance, and at any number of stations simulta- 

 neously. 



On a New Wheelbarrow. By Capt. F. Wilson. 



This harrow differs from those in ordinary use in the wheel being placed under- 

 neath and sunk into the floor of the barrow ; the weight is thrown on the wheel, 

 instead of being entirely between the hand and the wheel, an arrangement which 

 allows of doubling the load. 



The projection of the wheel inside the barrow is covered with an iron curved cap 

 with wooden sides, which to a certain extent may interfere with the free movement 

 of the spade; but it is so seldom used for such purposes, and the inconvenience so 

 slight, as not to require consideration. 



The floor of the barrow is broader at the handle than at the wheel. The handles 

 are a separate joint from the framework of the barrow, and are raised so as to decrease 

 the first lift as much as possible. 



A brass pin is placed in the middle at the top of the pent-board, directly in a line 

 with the wheel, so that it will serve as a guide to the labourer, where he requires 

 accuracy in his work. A wooden frame can be attached to the top of the barrow, 

 should the bulk of the load be disproportioned to the space. A scraper is placed 

 close to the wheel, to prevent it clogging the cap. 



