58 AUSTRALIAN AND TASMANIAN SANDARACH. 



residue remains. Petroleum spirit extracts 22"1 per cent, of 

 an apparently perfectly colourless and transparent resin. 



CALLITEIS COLTJMELLAEIS. F. v. M. 



Syn. Frenela rohusta A. Cunn., var. microcarpa Benth. B. 

 Fl. vi. 237. 



Sample 4. " Cypress Pine," etc. Found in New South 

 Wales and Queensland. Eeceived from the Botanic Gardens, 

 Sydney, Dec. 1887. 



This is in much larger masses than the others, and some 

 of it has been exuded for a considerable time. It is next 

 lightest in colour to 'No. 1. 



It almost wholly dissolves in rectified spirit, forming a pale 

 yellow solution. The insoluble residue amounts to 4*6 per 

 cent. Petroleum spirit, when digested on the residue, 

 removes no less than 35'8 per cent, of a transparent colourless 

 resin. This is a remarkable percentage, and it would be 

 worth while to enquire whether Australian Sandarach becomes 

 increasingly soluble in that menstruum by age. An ordinary 

 sample of commercial Sandarach yielded 8"9 per cent, to 

 petroleum spirit. 



CALLITEIS VEEErCOSA. B. Br. 



Syn. Callitris Preissii Miq. Frenela rohusta A. Cunn. and 

 others. B. PI. vi. 236. 



The following note by Dr. Julius Morel (Pharm. Journ. 

 [3] viii. 1,025), in regard to a South Australian specimen, is 

 interesting ! " With Sandarach resin may be connected 

 another resinous substance, which was exhibited in the Paris 

 Exhibition of 1867 from South Australia, under the name of 

 "pine gum." It is the resin of Callitris Beissii Miq. (a 

 misprint for Preissii'). This product resembles Sandarach, 

 and might become an important article of commerce. . . . 

 This resinous substance occurs in the form of slightly 

 yellowish tears, thicker and longer than those of ordinary 

 Sandarach. In consequence of unequal contraction, it pre- 

 sents, like Sandarach, numerous facets, and consequently the 

 surface appears to be covered with a white powder. By 

 examining this resin under the microscope, Wiesner ascertained 

 that the finer fissures were derived from the larger ones. In 

 its transparency and hardness the resin corresponds to 

 Sandarach. Its odour is very agreeable and balsamic, and 

 its taste is bitter and aromatic." 



" Mountain Cypress Pine," " Desert Pine." " A Sandarach 

 in larger tears than ordinary Sandarach is yielded by this 

 species. It yields it in considerable abundance, eight or ten 

 ounces being frequently found at the foot of a single tree^ 



