PROCEEDINaS OF THE POLYTECHNIC ASSOCIATION. 479 



sea weeds; species, 100, of which five are sea weeds. Corals, g-enera, 16; 

 species, 2'.). Bryozoa, genera, G; species, 10. Echinoderms, genera, 25; 

 species, 11. Molluscs, genera, 106; species, 419. Crustacea, genera, 25; 

 species, 31. Fish, genera, 8; species, 16. Reptiles, genera,!; species, I. 



Gamboge. 



M. I), llanbury stated before the London Pharmaceutical Society that the 

 exact botanical origin of gamboge had remained in obscurity until recently. 

 It was known to be a plant of the genus garcinia, but the species had not been 

 determined. The garcinia gambogia of Ceylon, it is said, does not yield a 

 good form of the drug, but the garcinia morella does. Gamboge is not 

 exported from Ceylon, but is produced in Siam. It is now- believed that the 

 two mentioned arc varieties of the same tree, depending on soil and cultiva- 

 tion. Messrs. D 'Almeida, of Ceylon, have twenty-eight; trees on, their plan- 

 tation. They are from thirty-five to fifty feet high, the largest being three 

 feet in circumference. They grow luxuriantly on the side of a hill without 

 any attention. Gamboge has been extracted from them from time to time, 

 but only as a matter of curiosity. 



Paris International Exhibition for 1867. 



It is reported that the building for the next great exhibition will be a crys- 

 tal palace in the new boulevard, extending from the arc de Trionipe, at the 

 head of the Champs Elysees, to the river Seine. It is to occupy the central 

 part of the boulevard, leaving on one side a space for carriages and pedes- 

 trians, and on the other room for a street railway, on the American plan. 



Tea from India. 



Forty years have not elapsed since the announcement of the discovery of 

 the tea plant in Assam. The sales of Assam teas were only 144,161 pounds 

 in 1847. The immense increase in th!s production will be realized when it is 

 stated that for the last year, ending in October, the sales of these teas at Cal- 

 cutta amounted to 3,348,663 pounds. It is believed the increase for the pre- 

 sent year will be at least twenty-five per cent. The amount of production is 

 only dependant of the kind of labor required. It is said that the various 

 failures to cultivate tea successfully are the result of a want of intelligence 

 among the only clas.s of laborers which low wages can command. 



Coal in France. 



In a recent railway excavation made, only fifteen miles from the city of 

 Lyons, a seam of good coal has been discovered which, it is said, indicates a 

 large depo.sit of coal at no great distance from the soil. No nation would put 

 coal to a better use than the French. 



A New Thermograph. 



One of the new instruments furnished for the French scientific exhibition 

 to Mexico is the self-registering thermometer of M. Marcy, of Paris. It is a 

 modification of the air thermometer, consisting of a metallic bulb attached to 

 a metallic tube only 0.0079 of an inch in diameter. The indicator of tern- 



