1 84 Profitable Poultry Keeping. 



The other machines made on this hot-wator principle are, 

 first, that of M. Voitellier, of Nantes, in France. This is 

 very similar to the Christy machine, except that it has the 

 egg drawer rather differently situated. It is one of the oldest 

 machines, and we have heard very favourable accounts of it, 

 both in this country and in France. Secondly, there are the 

 tubular incubators made by Mr. John Owen, of the Minories, 

 London, which are very similar to the Christy, having a boiler 

 at the side. In this case, the water in the tank is not reheated 

 by flowing through the boiler, but, connected with the boiler 

 are pipes through which the heated water flows, and these 

 heat the water in the tank. And, thirdly, there is the " Egg 

 ■ Oven," a machine invented by Miss May Arnold, of Acton. 

 This is almost conical in shape, and the tank above the eggs 

 forms an archway. The body of water held in it is very 

 large, so that the quantity to be supplied, in order to keep up 

 the heat, is very small indeed. Capital arrangements are made 

 for ventilation, cooling, and moisture; and, though we have 

 not had an opportunity of testing it in actual practice, as it 

 is of but recent introduction, we have great faith in it, as it 

 appears to be made upon very sound principles. All these 

 machines are made in various sizes, from thirty-six eggs 

 upwards, and are reasonable in price. 



The trouble involved with the hydro-incubators, led many 

 to experiment with self-heating machines, and we appear 

 now to be returning to the original system of continuous 

 burning lamps; but, certainly, they are in a much less 

 objectionable form than at first, as the water tanks are large, 

 consequently the loss of heat is small, and the boilers are 

 made small so that the water in them heats very rapidly. 

 As a result of these alterations, the lamp flames or gas jets 

 are diminutive, compared with the old ones, so that the vitia- 

 tion of the atmosphere is reduced to a minimum. These 

 sre decided steps in advance ; and, though we should prefer 



