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Chili Saltpetre.--Nitrate of soda is found in great abundance ]n the desert of Atacama. Under a bed of soil, varying in thickness from 10 to 50 centilnetres (3"937 to 19"685 in.), there is a compact layer of gypsum, under which the salpetre is found in irregular beds, with a thickness sometimes reaching to two metres (6"562 ft.). It is .often mixed with sulphate of soda. It comes from the decomposition ~)f the feldspathic rocks, and, as these rocks form the central part of ~he desert, the supply seems to be almost inexlmustible.--Les alfondes.
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๐ SIMILAR VOLUMES
Frank. Inst., represents this portion broken off and swinging around at a right angle to its proper position. This cord ipasses over the shrive k, and extends down to within a convenient distance of the floor, and has attached to its extremity the pan l, for holding the weight shown in Fig. 8. Care
Work of Diffusion.
Peckeliih and Washington, obtaining for the epoch of ininimum 1878"9. The variations in m~tgnetic declination at Milan, Vienna, Prague, Munich and Christiania indic tte the minimum epoch ]878"5. Both results agree in pointing to an epoch of 11"7 years.~Compt. Read. C.