OF ARTS AND SCIENCES. 345 



Henry W. Williams read an obituary notice of Hermann 

 von Helmholtz. 



The following papers were presented by title : — 



On the Thermal Conductivities of certain poor Conductors. 

 By B. O. Peirce and R. W. Willson. 



On the Simultaneous Partial Differential Equations : 



Byk -/<^^^ 



By B. O. Peirce. 



On certain Derivatives of unsymmetrical Tribrombenzol. 

 By C. L. Jackson and F. B. Gallivan. 



Trinitrophenylmalonic Ester, ^y C. L. Jackson and J. I. 

 Phinney. 



On Phenoquinone. By C. L. Jackson and G. Oenslager. 



On the Nitrite of Bromdinitrophenylmalonic Ester. By 

 C. L. Jackson and J. H. Moore. 



On Dinitrobromtoluol and some of its Derivatives. By 

 C. L. Jackson and M. H. Ittner. 



Contributions from the Gray Herbarium of Harvard Uni- 

 versity, New Series, No. 9 : — 1. On the Flora of the Gala- 

 pagos Islands, as shown by the Collections of Dr. G. Baur. 

 2. New and noteworthy Plants, chiefly from Oaxaca, collected 

 by C. G. Pringle, L. C. Smith, and E. W. Nelson. 3. A 

 Synoptic Revision of the Genus Lamourouxia. By B. L. 

 Robinson and J. L. Greenman. 



Studies in jMorphogenesis. 3. A Preliminary Catalogue of 

 the Processes concerned in Ontogeny. By C. B. Davenport. 



On the motion of the Recording Secretar}^ it was 



Voted, That it is expedient to publish in the Memoirs 

 Roland Thaxter's paper on Laboulbeniaceae. 



Eight hundred and seventy-sixth Meeting. 



October 9, 1895. — Stated Meeting. 



The President in the chair. 



The chair announced the death of Edward Samuel Ritchie, 

 Harold Whiting, and Henry Willard Williams, Resident Fel- 



