xxviii. Proceedings of the Society. 



a patent to secure for him ihe benefit of his invenation. 

 The plan, model and letter were referred to a Committee com- 

 posed of Colonel Lloyd, Dr. Perrol and Mr. Morris. 



Mr. Bojer in presence of the Meeting performed some expe- 

 riments to show the effects of different sorts of lime in clari- 

 fying cane-juice. In these experiments, the effect of the quick- 

 lime generally used in this process ihroughout the Island, was 

 compared with that of lime prepared by Mr. Bojer from frag- 

 ments of Sysler Ohells calcined before the Blowpipe. Mr. 

 Bojer mixed in a matrass one third of a grain of the pure pro- 

 toxide of calcium thus prepared, with 11,000 grains of the 

 juice of canes grown at Mapou : the matrass was placed in 

 boiling water, when, as the temperature of the juice rose, 

 flakes were observed in it. These were the gummy or mus- 

 cilaginous parts, which in a few minutes coagulated on the 

 surface of the mixture, leaving the rest perfectly clear and 

 limpid. The juice thus clarified never exceeded the temperature 

 of 162° F., that is 50 degrees below the boiling point of water. 

 This experiment repeated with the juice of canes grown in 

 Plaints- Wilhems produced a similar satisfactory result. 



Mr. Bojer now added to 8.000 grains of the same Mapou 

 juice one third of a grain of common lime preserved in a 

 ground stoppered Phial, but that appearing to have no effect 

 on the liquid though healed by being immersed in boiling water, 

 he added the second ar.d third portion, in all a grain; still 

 ne effect was visible. On the addition of a further third of a 

 grain the process of clarification began, but not even then was 

 ihe effect so great as that produced in the previous experiments 

 by the one-thild of a grain of lime prepared by himself. In 

 order to forward the clarification, Mr. Bojer then raised the 

 temperature of the mixture to the boiling point, but it remain- 

 ed turbed and of dark hue. It gnat'y changed the color of 

 Turmeric paper and had a strong alkaline smell. Mr. Bojer 

 justly observed that this great difference between the effects of 

 lime piopcr y prepared and of that in common use, which is 



