88 BULLETIN 109, UNITED STATES NATIONAL xAlUSEUM. 



tioa. He lias also exaininecl the iron ore of the Maquoqueta Valley, and we 

 shall be prepared to speak fully in reference to its extent and value. 



From what has been done already I feel that the geology of Iowa will have a 

 grent interest when once thoroughly worked out and the I'esults presented to the 

 public. In regard to the scientific results, or those which will attract attention 

 in the scientific world, I feel that there is already more material than I had 

 expected the entire survey to yield. 



PuhlicoMons of the survey. — The manuscript of the final report 

 would appear to have been submitted early in 1857 or the latter part 

 of 1856. Its receipt gave rise to the following joint resolution pro- 

 viding for the distribution of the reports : 



Resolved by the General Assembly of the State of loica, That the governor 

 be, and is hereby, authorized to procure the printing of 2,000 copies of tlie report 

 of the State geologist, and that he cause one copy thereof to be transmitted to 

 each member of the general assembly and the remainder to be deposited in the 

 office of the secretary of state. 



Resolved, That the governor be further authorized to draw his warrant on 

 the State auditor for the expense thereof, who shall audit and allow the same. 



For reasons beyond the control of the authors, due mainly, as it 

 appears from the report, to delay in engraving the necessary plates, 

 the volume was not ready for the printer until September, 1858, 

 when it was issued in two parts, the first being given up mainly to 

 general geology and physical geology and the second to paleontol- 

 ogy. The survey was discontinued at the end of the two years set 

 by the law of establishment. Hall, however, with characteristic per- 

 sistence, refused to give up, and in 1860 wrote the Hon. W. H. F. 

 Gurley suggestions for its revival, as follows : 



To the Hon. W. H. F. Guklet, 



Chairman of the Committee of Ways and Means 



of the House of Representatives of loiva, 1860. 



Sir: I take the liberty of submitting for your consideration some sugges 

 tions regarding the geological survey and its continuation, which are essentially 

 the same as I liave already verbally communicated to the committee of the 

 two houses. 



There are two ways in which the geological survey may be continued for 

 the next two years without making the larger appropriation that would be 

 required to complete the survey of the western half of the State. 



One of these modes vv^ill be the one already proposed to the committees, which 

 requires that I shall keep one assistant in the field, whose especial duty it shall 

 be, under the direction and supervision of the State geologist, to make careful 

 exploration of the counties occupied by the coal measures, and the results to 

 be laid down on the county maps in the same manner as upon those maps al- 

 ready shown to the committee; and beyond this to provide for the completion 

 of certain laboratory and office work which has been already commenced, and 

 which is necessary in the preparation of the materials previously collected and 

 those to be collected, for another report of the character of that already made. 

 It is absolutely necessary that tlds latter work shall go on or much will be lost 



