l894-] NEW-YORK MECROSCOPICAL SOCIETY. 61 



4. Longitudinal section of apothecium : by Carlton C. Cur- 

 tis. 



5. Section of Agate from basalt, Paterson, N. J. : by J. D. 

 Hyatt. 



6. Section of Pitch Stone, Isle of Arran, Scotland : by J. D. 

 Hyatt. 



7. Cinnabarite, cinnabar in chalcedony with native gold : by 

 J. D. Hyatt. 



8. Transverse section of stem of Poison Ivy, Rhus toxicoden- 

 dron: by J. D. Hyatt. 



9. Sections through head and thorax of House-Fly : by L. 



RiEDERER. 



10. Hemlock joist, 2X4 inches X 2 feet, from lintel of door of 

 outbuilding thirty-five years old, almost entirely eaten away by 

 our native large black ant, probably Campcnotus herciilaneiis L. : by 

 Frank D. Skeel. 



Mr. Hyatt explained his exhibit of Rhus toxicodendron by means 

 of blackboard drawings, showing that this stem, when growing 

 unattached, has the pith in the centre ; but when attached to a 

 tree or wall, always has an eccentric growth, the pith lying near 

 the bark on the outer side, and the enlarged rings of growth lying 

 on the inner side, next the object of support, thus indicating that 

 nourishment is derived through the rootlets which cling to the 

 support. 



The Microscope and Microscopical Methods. Part I. of 

 The Microscope and Histology. By Simon Henry Gage, 

 Associate Professor of Anatomy, Histology, and Embryology 

 in Cornell University. Fifth edition, rewritten, greatly 

 enlarged, and illustrated by 103 figures in the text. Ithaca, 

 N. Y. : Comstock Publishing Co., 1894. Pp. 165. Price 

 $1.50. 



This work had its origin in the necessities of the class room. As stated in 

 the preface, "the aim has been to produce a book for beginners in micro- 

 scopy, such as the author himself felt sorely the need of when he began the 

 study." How well this object has been accomplished, during the evolution of 

 fifteen years to this present edition, is demonstrated with great satisfaction- to 



