58 BULLETIN OF THE BUSSEY INSTITUTION. 
and taking up the residue with water the solution was found to be so 
strongly colored that it was wholly unfit for testing. The difficulty 
was overcome by mixing a small quantity of freshly prepared zinc 
hydroxide with the partially evaporated solution and filtering off the 
brown precipitate that fell. The evaporation of the filtrate was then 
proceeded with in the usual way, and several instalments of crystals 
of mannose-hydrazone were obtained from it, as is stated in the table. 
Stones of Olives (Olea Europea). From a, jar of pickled olives bought in 
Boston market. The stones were cut open and the meats removed. 
Not enough of the meat was obtained to permit of its examination. 
Tests of the products of the hydrolysis of roots of several kinds 
are enumerated in the following list and table. It should be said 
that mannose had previously been detected in this laboratory in 
the products of the hydrolysis of the roots of asparagus (Aspara- 
gus officinalis), chicory (Cichoriwm intybus), the Jerusalem arti- 
choke (Helianthus tuberosus), and the dandelion (Taraxacum 
officinale). See Bulletin of the Bussey Institution, II], 33, 34. 
Roots of the common buttercup (Ranunculus bulbosus) dug up at the 
_ Bussey Institution, October 25-27, 1902. 
Roots of Milk weed (Asclepias Cornuti). Dug up at the Bussey Farm, 
July 27, 1902. 
Roots of the large White Belgian Carrot (Daucus carota). Taken from 
a heap stored at the Bussey Farm, February 18, 1903. 
Roots of red clover (7rifolium pratense) dug up on July 17, 1902, at the 
Bussey Institution. 
Unevaporated 
Mannose was or was Evaporated 
v f hele. not detected inthe Mannose was or was not de- 
Name of the Material Examined. several fractions of tected in the several fractions 
the unevaporated of the evaporated product 
product of the hy- of the hydrolysis. 
drolysis. 
CS 
Sg Be S28 22 b5 BS 2 es ge Bs 
AQ SF 2 ee A5 sb ae ak sk ae 
Sa 68°58 88 88 Souee ee ee 
nD Ae AN HM sD He AN AO HSH FO 
Buttercup roots... ... ..,No No No No Yes Yes Vesa 
Milk weed foots: “o.4.8. 0» <, NOU NOR NO Yes Yes Yes No No 
Carrot roots... ...°. . 42. Yes No. No No (Yes Yes Yesmeecs aman 
Red clover roote (aie vrs ea Yes Yes No No 
Sweet potato « . 3)... 2).°. No No’ No No’ Yes Yes:Noune 
Dahlia roots... .%. .°. . Yes Yes Yes No Yes Yes*Yes Yes NowwNO 
Sweet-flag root-stalks . . . . No No No Yes Yes No No 
Sweet-flag rootlets ..... No No No Yes No No 
