i8i4 



AGRICULTURAL MACHINERY 



1309 - "Silicate Cotton" as Insulating Material for Boilers and Refrigerators.— scott 



James, in Ice and Cold Stora<^e, Vol. XIX, No. 2-m, pp. lovnM, 3 fij^ures. London, 

 August, 1916. 



The writer criticises the name " silicate cotton ", as unsuitable, since 

 the substance does not contain any cotton, and suggests " silicate fibre " 

 as a substitute. It consists actually of a silicate, or rather of a mixture 

 of calcium silicate with silicates of other bases. The material is prepared 

 from blast furnace slag, more especially from the semi-transparent portion, 

 of a vitreous nature, and does not undergo any change on exposure to the 

 air under ordinary conditions. 



The slag is melted and a jet of steam blown through which divides the 

 mass into an infinite number of small particles, of different shapes, contain- 

 ing air bubbles. One cubic foot of slag forms 12 cubic feet of silicate, which 

 thus includes 11 cubic feet of air. 



Besides being used for floorings as a noise absorbing agent, this mate- 

 rial is employed for boiler laggings. It is now coming into use as an insu- 

 lator for cold storage purposes as it has the advantage of being absolutely 

 incombustible and non-fermentable, while from the thermal point of view, 

 it is one of the worst conductors known. 



1 3 10 - Review of Patents. 



Austiia 

 Canada 



Germany 



Tillage Implements. 



72 056 Cultivator. 

 72 058 Motor plough. 

 168704 Hoe and cultivator combined. 

 169 032 Multi-furrow plough. 

 169 107 Drain plough. 

 169 195 Tractor plough. 

 169269 Share-lift. 

 169364 Roller coupled to j.lough. 

 169 372 Harrow. 

 169 593 Hoe. 



169 852 Method nf fixing cultivator disc^. 



292 096 Method of fixing the share to the frame, easily detached, espe- 

 cially for tractor ploughs. . 

 292 129 Spring connection for share of motor plough. 

 292 130 Cultivator with rotating knives, with axis of rotation parallel 



with the line of work. 

 292 181 Cultivator with vertical knife-bearing drums. 

 292 411 Grips for motor plough and other wheels, with pieces situated 



on the plane of the axle. 

 292 412 Chassis for reversible plough, workuig on the balance-plough 



principle. 

 292 438 Tractor plough. 

 292 439 Motor plough with fixed shares, adjustable for height by means 



of a rack. 

 292 628 Device for fixing and tmfixing ploughs coupled to the tractor 



chassis by means of a draw-bar. 

 292 629 Plough furnished with frame detachable at side for tractor 

 work. 



