225 



REMARKS. \ tree as far as ;it present known restricted in its geographical distribution to the 1 watershed 

 of the Nepcan River oi New- Smith Wales, and (lippsland, Victoria. The late Dr. Woolls was very probably the 

 first to collect material of this tree lor botanical determination and to forward it to Mueller under the local name of 

 I.i'jiiinii-i'itrr (" Eucalyptographia," Dec., iii). Thi- latter author, working on morphological "rounds, confounded 

 it with the " Ked Hox " /. . />t>l\'tin!ltc>ii"<, Schau Th" dried specimens of tlie two species are very much alike in 

 the shape i'l t ho leaves and fruits, but the trees differ considerably in other charai ters. For instance, the "Ked 

 Box " has a persistent " ]!ox " bark rij,dit out !< tin; brancldels. a dai'|k-re,l timber, and leaves larger than those of 

 this species. This tree has thick, rough, llaky bark. The two timbers alone an: siilhcient to ilitterentiate the trees, 

 and the essential oils possess quite distinct chemical constituent-. This is another example 1 showing how necessary 

 it is that field and other Observations are required in order (> determine correctly the specific rank of Kucalvpls. 

 This species generally occurs on the banks of rivers and creeks. It <lil!ers Irom /:'. f> >l;',iii!/i>-iii'>s in the colour of the 

 timbers. Maiden (Crit. Rev. Kuc. vol. ii, p. no), places this specie- mi ' 'niin, which was founded on an 



imperfect description and specimen "in plump bud and an expanded (lower " surely worthless data upon which 

 to perpetuate a systematic name. /.. linit.-riitti.i is a tropical specie 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained from Thirlmere, N.S.W., in July, 1900. The yield of oil was 0-3 per cent. 

 The colour of the oil was orange-brown, and the odour somewhat rank. The oil 

 contained a good quantity of phellandrene ; and pinene was present in small amount ; 

 cineol was detected, but only about 5 to 10 per cent, in the crude oil at time 

 of distillation. Aromadendral was also detected. The sesquiterpene was present 

 in some quantity, but esters were not pronounced. 



The crude oil had specific gravity at 15 C. == 0-8805 ', rotation a a -- 12-5 ; 

 refractive index at 20 = 1-4824, and was insoluble in 10 volumes 80 per cent, 

 alcohol. The saponification number for the esters and free acid was 3-3. 



On rectification, 2 per cent, distilled below 172 C. (corr.). Between 

 172-183, 48 per cent, distilled; between 183-255, 22 per cent, came over, and 

 between 255-276, 16 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp. gr. at 15 C. = 0-8624; rotation a u - - 16-9. 

 Second ,, ,, ,, =0-8697; .. -16-5. 



Third ,, ,, = 0-9378 ; ,, not taken. 



The laevo-rotation was largely due to the phellandrene. As only i per 

 cent, distilled between 200-255 C., the aldehyde aromadendral could only be 

 present in small amount. 



Leaves from this species were also obtained from St. Mary's, N.S.W., in 

 November, 1900. The oil differed but little from the Thirlmere sample; it 

 contained similar constituents, and the several fractions were laevo-rotatory to 

 about the same extent, but the aldehyde aromadendral was present in rather 

 larger amount. The specific gravity of the crude oil was 0-895. The cineol 

 present was about the same as in the previous samph; the saponification 

 number for the esters and free acid was 3-5. The crude oil formed a clear solution 

 with 2 volumes 80 per cent, alcohol. 



The above samples were mixed together and stored in the dark, and in August, 

 1919, the oil was again analysed. Not much alteration had taken place during 

 the nineteen years the oil had been kept, except that the rotation had fallen a 

 little, and the specific gravity increased to a small extent. These alterations 

 are what might be expected with Eucalyptus oils in which phellandrene occurs. 

 The crude oil had sp. gr. at 15 C. = 0-8912 ; rotation a v -- 10-0; refractive 



index at 20 = 1-4820. 

 Rectified portion ,, ,, - 0-8726; rotation - - 13-5; refractive 



index at 20= 1-4755. 



The cineol was determined by the resorcinol method in the rectified 

 portion ; when calculated for the crude oil the result was 17 per cent. The 

 indication with phosphoric acid was for about 10 per cent, of that constituent. 



