Si8 



THE TROPICAL AGRICULTURIST. 



[May. I, 1884. 



resolved to leave the bark to become older by another 

 year before it is shaved off for the second time. The 

 analyses 48 to 69 served to check our practise in pick- 

 ing out various types in the plantations. The choosing 

 according to external appearance seemed to be generally 

 right. At Tjiujiroean the evident hybrids were removed 

 from various plantations; 70-73 are specimens of the 

 product thus obtained. At Tirtasari and Nagrak also young 

 Ledgeriana plantatioas were pruned, on the first-uamed 

 establishment five to si.x year old plants, raised from 

 seed. The analyses 74-85 are of that product, and show 

 therein a quinine-yield of from 15 to 3 per cent, whilst 

 the pruuings of the yet very young grafts contained ah-cady 

 1'38 per cent quinine. That no ciuchonidine was found 

 therein is important, as the fear might e.^ist that the 

 succirubra stock e.xercised influence on the Ledgeriana 

 grafts, so that cinchonine formed in the latter. The fur- 

 ther analyses of the harvest, which are collected in the 

 statement under notice, yielded nothing of importance. 

 In statement E, however, I have noticed those of C. 

 laiicifotia, beciiuse they show that these plants, obtained 

 from seed of the original trees, however much often 

 differing in exterior yet agree on the whole with the 

 mother trees in the quality and quantity of the alkaloids. 

 Bandong, 1st February 1882. 



Review of the alkaloid determinations ferfoi-mei. during 1S81. 



Variety of Cinchona. 



O" 



1.9:2 



800 

 810 



6-77 

 6-67 

 2-94 

 8-45 

 6-39 

 9-10 

 6-14 

 6-26 

 8-38 

 4-45 

 2-61 

 2-96 

 303 



3 40 

 7-.:0 

 4-54 

 3-O4 

 3-30 

 2-08 

 6-64 

 6-U 

 2-61 

 2-29 

 2-62 



4 30 

 1-38 

 1-15 

 2-30 

 1-66 

 1-98 

 1-97 

 2-04 

 1-90 

 3-19 

 2-51 

 5-22 

 1-54 



9 



0-92 



0-26 

 0-43 

 0-16 



0-45 



076 



0-78 

 2-26 

 0-52 

 2-02 

 1-72 

 0-25 



1-94 

 0-55 



1-84 

 1-25 

 0-84 

 0-20 

 0-19 

 0-65 

 51 



sporen 



O-li. 



0-11 

 0-07 

 0-23 



0-50 

 0-54 

 1-73 

 0-93 



0-50 9-00 

 0-41 9-05 



0-65 

 0-52 



1-37 1-35 

 1-13 1-19 

 1-89 0-79 

 0-37 0-83 

 1-04 1-08 

 1-13 1-45 

 1-01 0-43 

 1-46 0-65 

 1-53 1-36 

 1-52 

 1-25 0-48 

 0-84 0-28 

 0-67 0-76 



2-52 



1-59 



2-16 



1-95 



2-66 



1-72 



1-31 



1-32 



212 

 1 -641 0-65 



1-29 



0-85 



1-61 



1-48 



1-30 



1-50 



1-48 



1-55 



1-56 



1-65 



I 73 



1-40 



9-40 



8-55 

 5-8i 

 10-77 

 9-52 

 10-30 

 9-02 

 8-62 

 7-07 

 7-08 

 7-52 

 7-08 

 501 

 4-62 

 10-57 

 7-61 

 4-63 

 5'46 

 6-87 

 10-55 

 767 

 4-12 

 370 

 6-29 

 802 

 2-67 

 200 

 3-81 

 314 

 3-28 

 3-47 

 3-52 

 3-55 

 4-76 

 4-27 

 702 

 317 



Eem.vrks. — No. 1, original bark; 2, bark renewed after 

 shaving, 2 years old, of the same tree ; 3, original bark ; 



4, bark renewed after shaving, 2 years old, of the same tree ; 



5, officinaliform hybrid : original bark ; 6, bark renewed after 

 sha-iing, two years old, of the same tree ; 7 to 10, sample of 

 the harvest; 11 and 12, twig bark; 13, very typical, 13- 

 year tree ; 14, original bark cut in slivers; 15, sickly neglected 

 trees; 16, renewed 4 year bark; 17, narrow-leaved variety 

 (var. angustifolia); 18 ai.d 19, very broad-leaved, succirubra- 

 hke hybrid ; 20, 2 years bark, renewed, after shaving of the 

 original ; 21, do do after partial stripping ; 22, loppings 

 from trees that died at the top; 23, .specimen of the har- 

 vest, 1st quality ; 24, do do 2nd quality ; 25 do do 

 3r. I broken quill; 26, do do dust; 27, do do root; 28, 

 original tree of Mclvor; 29, descendants from seed of the 

 foregoing, 8 years old ; 30, ten year old tree; 31, 18 year 

 old tree from seed from Peru ; 33 to 36, 8 year old tree 

 from seed from Bolivia (Mapiri); 36 to 43, original tree, 

 serving for seed-bearing; 44 and 45, blossoming tree reserved 

 for seed ; 46, bark renewed after shaving, 2 year old ; 

 47 and 48, original bark shaved off: h.arvest; 49, descend- 

 ants of No. 9 five years old ; 50, do No. 19 do do; 61, do 

 No. 2 seven do ; 52, do No. 4 five do, best type ; 53, 

 do No. 4 do do less good type; 54, do No. 3 seven 

 do best type ; 55, No. 3 do do middling type ; 56, do 

 No. 3 do do bad type ; 57, do No. 40 do do best 

 type ; 58, do No. 40 do do middling type ; 59, do No. 

 40 do do bad type ; 60, do No. 12 do do best type ; 

 61, do No. 12 do do middling type ; 62, do No. 12 



do No. 12 do do best type ; 64, 

 middluig type; 65, No. 12 do do 

 do. 13; 70,and 71. branch bark of 7 

 72, stem and branch bark of Ledgeri- 

 ana hybrids; 73, root b.ark of do; 74, twig bark of 2 year old 

 grafts ; 75 to 83, twig bark of 5 to 6 year old descendants ; 84, 

 stem and branch bark of do ; 85, twig bark of 5 to 6 year 

 old desceudnuts. 



do do bad type ; G'3, 

 do No. 12 do do 

 bad type; 66, to 69. 

 year old descendants ; 



