734 Report on the Trials of Imj)lements at Bedford. 



3515. Eansomes, Sims, and Head, of Ipswich, for their Patent Straw-burning 



Apparatus attached to a 10-Horse-Power Portable Steam Engine. 

 5066. Clayton and Shuttle worth, of Lincoln, for their Variable Expansion 



Motion, acted on by the Governor attached to a 7-Horse-Power 



Portable Steam Engine. 

 5127. Davey, Paxman, and Co., of Colchester, for their Patent Paxman Water 



Heater, B. No. 1. 



No. 119. Reading Iron Worlcs Company {Limited), Beading. — Four-H.P. 

 Patent Nozzle Vertical Boiler. — Tliis boiler consists of two parts, namely, a 

 circular fire-box. A, and a square tube chamber, b, which is traversed by rows 

 of tubes, c, set at right angles to each other. At the ends of the tubes are 

 fixed cast nozzles or circulators, d, the action being, that as soon as the 

 steam is generated, it readily and necessarily passes off at the turned-up 

 nozzles, d\ the water rushing in at the turned-down nozzles, d, to supply 

 its place ; thus a circulation of the water is obtained (see Figs. 45 and 46). 



The heating surface is, 



Of Tubes 31'6 square feet. 



„ Fire-box .. ,. 9*7 „ „ 

 „ Tube chambers .. 17*7 „ „ 



Total heating surface,. 59'0 „ „ 



From the fact of the sets of tubes crossing each other, sieves are formed, 

 through which the heated gases must pass, and thus the heat is well 

 utilised, rendering this a very economical boiler as regards fuel. 



1000. J. Foivler and Co., of Leeds. — Patent Windlass for Steam-cultivation 

 on a Triangular Bound-alout System. — The windlass consists of two horizontal 

 winding-drums, each provided with a coiling-gear. These are worked by 

 pinions and a pair of bevel wheels, which are connected with the crank-shaft of 

 the engine by means of a short shaft and universal joint. A lever is employed 

 for throwing the two dmm-piuions in and out of gear, and the drums are set 

 in motion without reversing the engine ; hence engines unprovided with 

 reversing gear may be employed. The windlass is placed on four wrought-iron 

 wheels. In beginning work in a field, the engine and windlass are placed on 

 the headland, while the anchors are placed on the side headlands in a line 

 with the windlass. The claw-anchors, attached by a rope to a winding 

 apparatus on the anchors, are taken to the far corners of the field and fastened 

 there. Thus the anchors travel away from the engine as the work proceeds, 

 and require the employment of only a small quantity of rope at the start, 

 which is an advantage for making a quick beginning ; they also dispense 

 with the labour of taking the anchors to the far corners of the field. The 

 anchors are kept fixed between the plough-ropes and the winding-forward rope ; 

 this, therefore, as well as the regular decrease of rope on the drums as the work 

 goes forward, insures the rope being properly coiled. 



The work is therefore done on a triangular system ; but if it is desired to 

 avoid the rope passing over the land, snatch-blocks are placed at the corners 

 ill a line with the windlass, thus keeping the rope in a fixed line along the 

 headland. 



When the field is finished, no horses are required to move the anchors and 

 implements, for they are pulled back by the plough rope. 



1742. W. N. Nicholson and Son, of Newark-on- Trent. — Self-acting Delivery to 

 Horse-raJce. — By pressing the foot-step B (Fig. 47, p. 736), or elevating the hand- 

 lever c, the rule-joint A is depressed and unlocked; thus the catch d is slipped 

 over the stop E. The catch d pivots on the rod f, which is attached to the 

 rocking-frame g of the rake. The pawl H is fixed on the opposite end of the 



