120 MANUAL FOR SUGAR GROWERS. 



When the instrument is used as a saccharometer 

 it is preferable, tlien, to take the density after clari- 

 fication, when the air and a considerable quantity of 

 impurities have been removed. To do this, a sample 

 should be taken from the clarifier and rapidly cooled 

 b}^ pouring into a shallow metal dish floating in 

 water ; when cooled, the juice is poured into a deep 

 narrow vessel, and the density taken ; the tempera- 

 ture of the liquid being noted, and a correction 

 made if the temperature differ from that at which 

 the hydi'ometer is graduated. Much more trust- 

 worthy results are obtained by this method, as the 

 density is taken in juice containing much less im- 

 purities and free from air. 



The following method of using the hydrometer 

 may be found useful in muscovado boiling-houses, 

 where chemical control is rarely obtainable ; in larger 

 factories more accurate methods are usually em- 

 ployed. By taking the density in the manner di- 

 rected, and calculating the amount of sugar present 

 in the juice from the table, the planter can ascertain 

 approximately how the work of the boiling-house is 

 being carried on ; for, by dividing the total pounds 

 of sugar by 1.3, he will obtain the number of pounds 

 of cured muscovado sugar which should be made. 

 This, of course, will only be approximately true, but, 

 being so easily carried out, serves as a useful control. 

 It is advisable to make a deduction of seven or ten 

 per cent, from the total sugar in the case of young 

 canes, or of three per cent, in the case of sound ripe 

 canes, on account of the glucose, etc., present. 



