Transition sandrock (Eaton), see Oalciferous sandrock. 



Transition system. Conrad. Organic Remains of Lower Transition or 



Silurian System. Pal. rep. (for 1837) 1838. p.107-19; (for 1838) 1839. 



p.57-66; (for 1839) 1840. p.200-7; (for 1840) 1841. p.25-41. 

 Conrad. Table of Formations, showing- the Order of Superposition and 



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



1838) 1839. p.62-63. 

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

 Vanuxem. Advantages of Study in United States. Geol. rep. 4th dist. 



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

 See also New York series. 

 Trap. Gushing. Diabase of Franklin County. 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 Volcanic Rocks of Essex County. Geol. 



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

 Emmons. Trap or Igneous Rocks of Warren County. 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. IS (for 1898) 1899. 



p.22-42. Same, 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. lep. 1st dist. (for 1837) 1838. p. 140. 

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



dist. (for 1838) 1839. p.122-23. 

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

 Merrill. Road Materials. Mus. bul. 17. 1897. p.l04. Same, Mus. rep. 50 



(for 1896) 1898. 1:104 (2d paging). 

 Mus. bul. 19. 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 paging). 

 remsed by Merrill. Mus. bul. 19. 1898. p. 184. 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. 1848. 



p.278-85. 

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

 Tremolite. Merrill. Tremolite. Mus. bul. 19. 1898. p.l21. Same, 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 1849) 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) 1899. 1:147-49. 



