WASHINGTON COUNTY. 473 
The proximity of the quarries to the railroad and river greatly in- 
ereases the value of the location. Down the river, near the Dunham 
township line, the sandstone has been quarried for many years by a com- 
' pany under the superintendence of Mr. William McClure. The ‘ Con- 
stitution stone” of this company is a very beautiful bluish-gray stone of 
fine texture, and admirably adapted to ornamental architectural work. 
It has been introduced into Chicago and other cities. It is a firm and 
durable stone, and capable of resisting great pressure without fracture. 
It will also resist the influence of heat, in case of fire, far better than 
limestones and marbles. 
For miles along the Ohio River hills quarries might he opened, 
although stone of the very highest quality, and that adapted to special 
uses, either for grindstones or for building, will be found in more limited 
areas. Messrs. D. Briggs, Henry Cole, D. B. Caldwell, Calvin Finch, the 
the Ohio River*Stone Company, and others, are engaged in converting 
the sandrock of the quarries into grindstones. The middle sandrock, or 
No. 3 in the geological section, is generally preferred for grindstones. 
_ At some of the quarries nearly the whole of the stratum, or twenty-five 
feet, is available. 
DUNHAM TOWNSHIP. 
This township hes directly north of Belpre. It is a long, narrow town- 
ship, with three miles of the Ohio River bordering it on the east. Its 
surface drainage is almost entirely effected by the Hast Branch of Little 
Hocking and its tributaries, the streams flowing into the Ohio being v ery 
small. 
The same thin seam of coal found in Fairfield, Belpre, etc., called the 
Hobson seam, is found in Dunham township. Its stratigraphical posi- 
tion is seen from the following section c on Little Hocking, in section 16, 
on the farm of Harvey Ellenwood: 
Ht, In. 
HL SUTRA gS ve) Keene ce teen eran rom REISE UNE LES ed SU ON 8 0 
as)!» UBANDKS) 'CCUBY, (SLMEN I). a an Selb cos SIGE PIA ERIS SECA Te etre Mi EE Meant 4 0 
3. Coal, Hobson seam...... AiSEiOd BGC Hc HAG SIEGEL EAS ORE GEE BAER Ata EE aa EN Sead GH 
Absit LOLAYO ISU BHE NY, cde eno hObGeeeaOee GEC ESCH REBEL ECPE EEE CHEE EEE E Sr EER EERE Risin ez te dae Dae () 
Bis) SINUS abccidunde Ms oAnHelaaUals OAM UL ANS aA hese UD RS ano MR Ee AM a AO 18. © 
CHP ATMA LE CSAIL SE OTC pueman arma eine nn A RUIN USR Yr 0 UND Ac MEL Skate ned tt 0 
Chesih FSU EN eh 4 Leh ais Gap at bai GSAC Se SEA aa Ee Rea ene a ER NL a 11570 
SMe Manin ALEC sad Sto mewn manana neen Lae Skea kL AA CAC ERLE DELI Di 6 0 
Highest mark of back-water of Ohio River. (See Map XI., No. 11.) 
The black stain of the Hobson coal can be seen in many places in the 
township. 
No well defined layers of limestone were seen, but such may exist, for 
