372 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



in water containing a few drops of sulphuric acid, and werl 

 wrung, will make the sirup perfectly clear. It is best to fill 

 the preserve jars with the sirup when cold, but if it has been 

 done when hot, the vessel must be filled up after cooling, as 

 the vapor condenses on the portion of the vessel left empty, 

 and, running down, dilutes the upper stratum of the sirup, 

 thus making it more liable to spoil. 8 (7,1871,14,109. 



IMMENSE GAS COOKING-STOVE. 



The London Mechanics' Magazine gives an account of a gas 

 cooking-stove, manufactured for the Earlswood Lunatic Asy- 

 lum, and capable of preparing a dinner for one thousand per- 

 sons. It measures sixteen feet in length, six and a half feet 

 in height, and two and a half feet in depth, weighing about 

 three tons, and is so constructed as to perform every variety 

 of cooking required under any circumstances, with the excep- 

 tion of boiling or steaming, for which other provision is made 

 in the asylum. The gas, when used, is mixed with atmos- 

 pheric air, and the stove is calculated to consume one hundred 

 and fifty feet of gas per hour. Many advantages are claimed 

 for this stove, both on the score of economy and convenience. 

 It is stated, as the result of experiment, that the loss of weight 

 in cooking one hundred and eighty-four pounds of meat was 

 only eighteen pounds, while the loss in cooking the same 

 amount by a coal fire was thirty-four pounds. 3 A, June 17, 

 437. 



SUGAR-CUTTING MACHINE. 



We can all remember when ordinary loaf-sugar was broken 

 up at home, frequently by means of a knife and a flat-iron, or 

 less frequently, perhaps, by means of a chisel and hammer or 

 mallet. After a time the operation was performed either at 

 the manufactory or by the grooer, as a means of alleviating 

 the labors of the housekeeper, although it was not until after 

 a considerable interval that the sugar, thus treated, was fur- 

 nished in cubical blocks of uniform size, as we now see it. 

 Various forms of apparatus have been suggested from time 

 to time for accomplishing this result, the principal object be- 

 ing to secure an equal division, and, at the same time, cause 

 as little waste of the material as possible. An improved form 

 of apparatus has recently been devised, in which the loaves 



