INDEX. 377 



Phoronw architecta — Continued. i-age. 



method of study of 76 



segmentation of 77 



summary of study of 107 



see also AcHnotrocha. 



Pyrosoma, memoir on a new, by W. K. Brooks 149 



King-pendulum, azimuth error calculated 12 



conclusions drawn from use of, in determining acceleration i >f gravity 23 



construction of the rings 13 



described, theory of stated, desirability of discussed, etc 3 



effect of flaws, etc., on the period of the ring calculated 6 



effect of nonbomogeneity and errors of figure calculated 8 



history of use in determining absolute value of acceleration of gravity 3 



measurement of the period 17 



measurement of the rings 15 



value for acceleration of gravity determined by 23 



vibration of a perfect ring calculated 4 



Ring-pendulum method, determination of absolute value of acceleration of gravity by 1 



Ritter, W. McK., tables and perturbations by 200 



Ross, Frank, assistant in preparing seventh memoir 193 



Snake, action of alcohi >1 upi in isolated heart of 62 



Snapping turtle, action of alcohol upon isolated heart of 63 



Thyra, explanation of tables of 204 



tables of 246 



77 Html Hi anomala (Torr.) Clarke, discussed 173 



figured pi. s (p. \\rl) 



Tradescanlia compared with Commelina and Weldenia 188 



crassifolia Cavan, discussed 181 



floridana Wats., discussed -. . . 182 



micrantha Torr., discussed 183 



pinetorum Greene, discussed 181 



rosea Vent., discussed 1 75 



figured pis. 2 and 7 ( p. 192) 



seopulorum Rose, discussed 179 



virginica L. , discussed 177 



figured pis. 2 ami 7 (p. L92) 



warszt wicziana Kunth and Bouche, discussed 183 



figured _.-... pi. 8 (p. 192) 



Traverse tables (Table B) 218 



explanation of 21 11 



Tunicates, pelagic, memoir on the affinities of, by W. K. Brooks 149 



Watson asteroids, memoir on, by A. O. Leuschner 193 



Weldenia Candida Schult. fil. , figured '. pi. 8 (p. 192) 



Williams's apparatus for measuring action of alcohol upon the isolated reptile heart, figured lig. 2 (p. 57) 



result of experiments with pi. 3 (p. 70) 



Wood, H. C, and Hoyt, I •. M.: Memoir on the action of alcohol upon the circulation 39 



Wood and Hoyt's apparatus for measuring action of alcohol upon the isolated reptile heart, figured fig. 3 ( p. 60) 



o 



