THE GEOLOGICAL SURVEYS OF ARKANSAS. 833 



which reports the Governor shall lay before the General 

 Assembly." 1 



Annual reports are the only ones provided for, and it is for 

 this reason that the volumes, instead of being numbered con- 

 secutively, are given as annual reports, and divided into volumes, 

 one volume generally being devoted to a single subject. 



The greater part of the topographic maps made by the survey 

 will accompany the final report on coal. They embrace an area 

 of 3240 square miles ; the maps are on a scale of one mile to the 

 inch, the contour interval is twenty feet. The total area mapped 

 topographically is 4,500 square miles, while topographic sketch 

 maps have been made of about double that area, and special 

 areas have been mapped on scales varying from 300 to 1,000 

 feet to the inch. 



The following are the reports published under the Branner 

 survey. 2 



Annual Report for 1887. — Administrative (pamphlet). Pp. 15. 

 Annual Report for 1888. 



Vol. I. — Gold and silver. Pp. 320-l-xxxi; 2 maps. 



Vol. II. — Mesozoic. Pp. 319-l-xiv ; illustrated ; 1 map. 



Vol. III. — Coal (preliminary). Pp. i20-|-x ; illustrated ; 1 map. 



Vol. IV. — Washington county ; Plant list. Pp. 262 -|-xiv ; illustrated; 

 1 map. 



Annual Report for 1889. 



Vol. II. — Crowley's Ridge. Pp. 283 + xix ; illustrated; 2 maps. 

 Annual Report for 1890. 



Vol. I. — Manganese. Pp. 642-l-xxvii ; illustrated ; 3 maps. 



Vol. II. — Igneous rocks. Pp. 457 + xv ! illustrated 6 maps. 



Vol. III. — Novaculites. Pp. 443 — {- xx ; illustrated ; 2 maps. 



Vol. IV. — Marble. Pp. 443 -\- xxiv ; illustrated ; atlas of 6 maps. 

 Annual Report for 1891. 



Vol. I. — Mineral waters. Pp. 144 -)— viii ; 1 map. 



Vol. II. — Miscellaneous — Benton county; Elevations; River obser- 

 vations ; Magnetic observations ; Mollusca ; Myriapoda ; Fishes ; 

 Dallas county. Pp. 349 -\- xii; illustrated; 2 maps. 

 Annual Report for 1892. 



Vol. I. — Iron deposits. Pp. 153 -f-x ; 1 map. 



Vol. II. Tertiary. Pp. 207 -f- xiv ; illustrated; 1 map. 



1 Acts of Arkansas, 1887, p. 58. 



2 A bibliography of the Geology of Arkansas is given in Vol. 11 An. Rep. Geol. 

 Survey of Arkansas, 1891, pp. 319-340. 



