508 XEW YORK STATE MUSEUM 



Transition sandrock (Eaton), see Calciferous sandrock. 



Transition system. Conrad. Organic Remains of Lower Transition or 

 Silurian System. Pal. rep. (for 1837) 1S38. p.107-19; (for 183S) 1839. 

 P.5T-66; (for 1839)4840. p.200-7; (for 184^)) 1841. p.25-41. 



Conrad. Table of Formations, showin.ir the Order of Superposition and 

 some Characteristic Fossils of the Transition Strata. Pal. rep. (for 

 1838) 1839. p.62-63. 



Emmons. Use of Term. Geol. N. Y. pt2. 1842. p.21-22. 



Yanuxem. Advantages of Studv in United States. Geol. rep. 4tli dist. 

 (for 1836) 1837. p.204-9 (ed.2, p.20(>ll). 



See also New York series. 



Trap. Gushing. Diabase of F-rankliu Countv. Geol. rep. 18 (for 1898) 

 1899. p.117-22. Same, Mus. rep. 52 (for 1898) 1900. 2:117-22. 



Emmons. Trap; Greenstone Trap. Geol. N. Y. pt2. 1842. p.82-84. 



Emmons. Trap, Porphyry or Yoleanic Rocks of Essex County. Geol. 

 N. Y. pt2. 1842. p.263-65. 



Emmons. Trap or Igneous Rocks of Warren Countv. Geol. N. Y. pt2. 

 1842. p.184-85. 



Hall. Trappean Rocks. Pal. N. Y. 1859. 3:78-80. 



Kiimmel. Trap Rocks of Rockland County. Geol. rep. 18 (for 1898) 1899. 

 p.22-42. Sa7ne, Mus. rep. 52 (for 1898) 1900. 2:22-42. 



Leeds. Lithology of the Adirondacks. Mus. rep. 30 (for 1876) 1878. 

 p.79-109. 



Mather. Trap Rock Greenstone. Geol. rep. 1st dist. (for 1837) 1838. p.l40. 



Mather. Trap Rocks of Rockland and Orange Counties. Geol. rep. 1st 

 dist. (for 1838) 1,S:39. p.122-23. 



Mather. Origin of Trap Rocks. Geol. N. Y. ptl. 1843. p.283. 



Merrill. Road ^Materials. Mus. bul. 17. 1897. p. 104. Same, Mus. rep. 50 

 (for 1896) 1898. 1:1C^4 (2d paging). 



Mus. bul. 10. 1898. p.204. Same, Mus. rep. 51 (for 1897) 1899. 



1:204. 



Smock. Trap-rock. Mus. bul. 3. 1888. p.l3; 10. 1890. p.205, 206-7. 



revised by Merrill. Mus. bul. 15. 1895. p. 380. Same, Mus. rep. 



48 (for 1894) 1895. 1:380 (2d pa,glng). 



revised by Merrill. Mus. bul. 19. 1898. p.lS4. Same, Mus. rep. 



51 (for 1897) 1899. 1:184. 



Woodworth. The Northumberland Volcanic Plug; with Notes on the 

 Petrography and Age of the Rock, by H. R. Gushing. Geol. rep. 21 

 (for 1901). In press. 



See also Crystalline rocks; Dikes. 



Trappean division. Mather. Trappean Division. Geol. N. Y. ptl. 1843. 



p.278-85. 



Trees, see Forest trees; Fruit trees; Shade trees; Spruces. 



Tremolite. Merrill. Tremolite. Mus. bul. 19. 1898. p. 121. Sa^ne, Mus. rep. 

 51 (for 1897) 1899. 1:121. 

 Nason. Tremolite. Mus. bul. 4. 1888. p.8. 

 See also Amphibole. 



Trench inclosures. Ground-plans and Dimensions of Several Trench En- 

 closures in Western New-York. Mus. rep. 2 (for 1848) 1849. 5pl. 



Hough. Ancient Remains of Art in Jefferson and St Lawrence Counties. 

 Mus. rep. 3 rev. ed. (for 1.849) 1850. p.99-105. 5pl.; 4 (for 1850) 1851. 

 p.103-9. 5pl. 

 Trenton group. Merrill. Trenton Group. Mus. bul. 19. 1898. p.147-49. 

 Same, Mus. rep. 51 (for 1897) 1890. 1:147-49. 



