﻿58 



Cincinnati Society of Natural History. 



our rocks are not. These are now, in all well regulated cabinets, placed 

 separately from the minerals proper. We have room in our present cases 

 for a much larger number of species of minerals by taking out the dupli- 

 cates and placing them on the exchange list. I am making out a list of 

 what we need to make our collection a profitable one for our young folks 

 to study as well as attractive to our citizens and stranger visitors. When 

 complete I shall present it, with the probable cost, and hope that our Hon- 

 orable Board will furnish the amount requisite for the purchase. 



Yours, very truly, J. W. Hall, Jr., 

 Curator of Mineralogy Cin. &oc. Nat. History. 



Cincinnati, 0., April, 1884. 

 Gentlemen of the Cincinnati Society of Natural History: — En- 

 closed with my Annual Report you will please find the following supple- 

 mentary suggestions which, if acted upon favorably, will add very materi- 

 ally to the value of our collection as well as interest. I have spent con- 

 siderable time and care in making a selection of rocks which will show 

 each formation from Archaean to recent, and have them stratagraphically 

 arranged. I find that Ward & Howell have precisely the specimens we 

 want, and they will send 100 specimens, carefully labeled, with formation 

 and locality, and on blocks. We also need very much a lithological series 

 of rocks, which will contain not only the rocks that will likely 

 be met with by ordinary observers, but characteristic and typical rocks of 

 the most important varieties. This series will contain 100 specimens, 

 located and named properly. This series will cost about $45 and the first 

 $50 ; total $95, for 200 specimens I intend to rearrange the whole col- 

 lection if these series are granted as a basis. In the rearrangement I will 

 select specimens and make a separate collection illustrated ; 1st, Struc- 

 tural and Phenomenal Geology, with the following divisions : " Varieties" 

 of Structure, Concretionary, Cellular, Porphyritic, Stratified, Texture, 

 Veins, Metamorphism, etc.; also, 2d, another case showing tests of min- 

 erals, as Lustre, Color, Dichroism, Diaphaneity, Refraction. Polarization, Co- 

 hesion. Aggregation, Form and Crystallography. I shall be happy to meet 

 with any committee and explain more fully my plan and how it can be 

 done with comparatively little expense. We need to have our collection in 

 all departments not merely deposited for safe keeping, but it should be 

 arranged so as to have a scientific and educational value. With the sugges- 

 tions offered I think we can have a valuable change, not to be estimated on 

 a money basis. Yours, very respectfully. J. W. Hall, 



Curator of Mineralogy, C. S. N H. 



