for investigation, viz., the Geology of the State, and the 

 Natural Historv, or Botany and Zoology, of the State. The 

 law proposes distinctly three aims with reference to which the 

 work should be prosecuted; first, the scientific aim of ad- 

 vancing our knowledge of the Geology and Natural History 

 of the State; second, the economic aim of leading to the most 

 effective conservation and utilization of its resources; third, 

 the educational aim of helping the work of the schools by 

 furnishing the results of investigation in form adapted for the 

 use of teachers. 



The Survey has already published the following Bulletins: 



i. First Biennial Report of the Commissioners of the State Geo- 

 logical and Natural History Survey, 1903-1904. 



2. A Preliminary Report on the Protozoa of the Fresh Waters of 



Connecticut: by H. W. Conn. 



3. A Preliminary Report on the Hymeniales of Connecticut: by 



E. A. White. 



4. The Clays and Clay Industries of Connecticut: by G. F. 



Loughlin. 



5. The Ustilagine£e, or Smuts, of Connecticut: by G. P. Clinton. 



6. Manual of the Geology of Connecticut: by W. N. Rice and 



H. E. Gregory. 



7. Preliminary Geological Map of Connecticut: by H. E. Gregory 



and H. H. Robinson. 



8. Bibliography of Connecticut Geology: by H. E. Gregory. 



9. Second Biennial Report of the Commissioners of the State 



Geological and Natural History Survey, 1905-1906. 



10. A Preliminary Report on the Algae of the Fresh Waters of 



Connecticut: by H. W. Conn and L. W. (Hazen) Webster. 



11. The Bryophytes of Connecticut: by A. W. Evans and G. E. 



Nichols. 



12. Third Biennial Report of the Commissioners of the State Geo- 



logical and Natural History Survey, 1907-1908. 



13. The Lithology of Connecticut: by J. Barrell and G. F. Loughlin. 



1 4. Catalogue of the Flowering Plants and Ferns of Connecticut 



growing without cultivation: by a Committee of the Connec- 

 ticut Botanical Society. 



15. Second Report on the Hymeniales of Connecticut: by E. A. 



White. 



16. Guide to the Insects of Connecticut: prepared under the 



direction of W. E. Britton. Part I., General Introduction: 

 by W. E. Britton. Part II., The Euplexoptera and Orthop- 

 tera of Connecticut: by B. H. Walden. 



17. Fourth Biennial Report of the Commissioners of the State 



Geological and Natural History Survey, 1909-1910. 



18. Triassic Fishes of Connecticut: by C. R. Eastman. 



19. Echinoderms of Connecticut: by W. R. Coe. 



Four of these Bulletins, Numbers 13, 16, 18, and 19, have 

 been published during the past two years. 



The Bulletin on the Lithology of Connecticut includes a 

 general introduction to Lithology and the description of forty- 

 one types of rocks found in Connecticut. Suites of illustrative 

 specimens have been distributed to Colleges, High Schools, and 

 Academies, in the state. 



Bulletin 16 is the first instalment of a work which it is 

 proposed to carry on to completion in future years, on the 



