(14 REPORT 
studies. He has pursued his work at financial sacrifice to himself, which 
is the best evidence of his genuine devotion to the scientific work, which 
forms the last bulletin of this volume. 
FIFTH. THE LIME RESOURCES OF OHIO, CONSIDERED ESPECIALLY FROM THE 
STANDPOINT OF CEMENT MANUFACTURE, BUT INCLUDING A STUDY 
OF THE TECHNOLOGY OF THE LIME INDUSTRY. © 
The preparation of a bulletin on the resources available for cement 
‘manufacture was necessary to the complete presentation of the subject 
‘taken up in Bulletins 2 and 3. The original intention was to confine the 
work to those lime deposits likely.to be of value in the cement industry. 
But it was found that a study of the latter really involved a knowledge of 
All@tinvenlinielresouncesaus 
The subject of the lime industry had been reported upon by Dr. Orton 
in 1888 in considerable detail and his work required but little editing to 
bring it up to date. Accordingly it was decided to go irito the whole sub- 
ject of the lime industry and bring it out as a bulletin, while all the time 
devoting special consideration to the cement resources and possibilities. 
Also, the technology of lime burning and use had never been ade- 
‘quately studied, and an effort was made to present the facts in this connec- 
‘tion with some considerable completeness. Special Assistant, Samuel V. 
Peppel, B. Sc., was given charge of this topic in connection with his col- 
‘lection of data for the cement resources, and has carried it out with much 
‘energy and enthusiasm. His completed report is now in press, and will be 
published as Bulletin 4, Chapters 5 and 6. 
| The first four chapters of Bulletin 4 deal with the occurrence of the 
lime resources, their sampling and composition and have been prepared by 
the State Geologist or jointly by the State Geologist and Mr. Peppel. 
SIXTH. THE MANUFACTURE OF SAND-LIME BRICK. 
This topic was also taken up in connection with the work of Bulletin 
4, as it could be done easily in connection with it. The industry is a new 
one in this country, but has become well established in Germany, where 
upwards of one hundred plants are in successful operation. By this pro- 
cess, building brick of good grade are made from sand into which 5 to 
10 per cent. of caustic lime has been thoroughly mixed. The mixture is 
‘shaped into bricks in powerful presses, and these are hardened in an 
‘atmosphere of steam for ten hours or more at high pressure. The pro- 
cess invites not only the use of lime on a large scale, but also opens the 
way to a still larger use for sand. | 
Mr. Samuel V. Peppel was also placed in charge of this work and 
has prepared a very excellent report on the subject, which will appear as 
Bulletin 5. Permission to publish in advance portions of this report in 
‘technical journals was given some time since, and these preliminary re- 
‘ports have attracted wide attention over the country. 
