iiig in the sarne field, to have been the foremost American histolo- 

 gist and microscopist, and one of our most skilful and accomplished 

 biologists ; one the rule of whose scientific life was a practical 

 application of experimental philosophy. A true naturalist, he was 

 an enthusiast, and yet in his methods of study severe, exact, and 

 in all respects scholarly." 



A list of the scientific writings of Henry James Clark is here 

 subjoined. 



The Peculiar Growth of Rings in the Trunk of Rhus toxicoden- 

 dron. (Proc. Amer. Acad., Vol III., 1856, p. 335.) 



The Excentricity of the Pith in Ampelopsis quinquefolia and 

 Celastrus scandens. (unpublished.) 



Contributions to the Natural History of the United States. 

 1857-62. (Conjointly with Prof. Louis Agassiz.) 



Recapitulation of the "Embryology of the Turtle," as given in 

 Professor Agassiz's "■Contributions to the Natural History of the 

 United States." (Am. Jour, of Science, II. Vol. XXV., 1858, 

 pp. 342-357.) 



Some remarks upon the use of the microscope, as recently 

 improved, in the investigation of the minute organization of living- 

 bodies. (Proc. Amer. Acad., Vol. IV., 1859, pp. 136-149 ; Am. 

 Jour, of Science, II. Vol. XXVIII., 1859, pp. 37-48.) 



On the Identity of the Vibrios and the muscular fibrillar. (Proc. 

 Amer. Acad., Vol. IV., 1859, pp. 199-201 ; expanded and pub- 

 lished under the title, On the Origin of Vibrio, Am. Jour, of 

 Science, II. Vol. XXVIII., 1859, pp. 107-109.) 



On Apparent Equivocal Generation. (Proc. Amer. Acad., Vol. 

 IV., 1859, pp. 207, 208 ; Am. Jour, of Science, II. Vol. XXVIII., 

 1859, pp. 154, 155.) 



Lucernaria the Coenotype of Acalephae. (Proc. Boston Soc. 

 Nat. Hist., Vol. IX., 1862, pp. 47-54; Am. Jour, of Science, II. 

 Vol. XXXV., 1863, pp. 346-355 ; Ann. Mag. Nat. Hist., London, 

 III. Vol. XII., 1863, pp. 19-30.) 



Prodrornus of the History, Structure, and Physiology of the 

 order Lucernariae. ' (Jour. Boston Soc. Nat. Hist., Vol. VII., 

 1863, pp. 531-567.) 



Actinophrys. (Proc. Boston Soc. Nat. Hist., Vol. IX., 1863, 

 pp. 282-284 ; republished under the title, On the cellular struc- 

 ture of Actinophrys Eichornii, Am. Jour, of Science, II. Vol. 

 XXXVIII. , 1864, pp. 331, 332 ; Ann. Mag. Nat. Hist., III. Vol. 

 XIV., 1864, pp. 394, 395.) 



