20 BULLETIN 122, U. S. DEPARTMENT OF AGRICULTURE. 
(12) GLOUCESTER STONY LOAM, SUBSOIL. 
No. 4 sand.- — Minerals other than quartz, 25 per cent. Potash 
feldspars (orthoclase and microcline), 6 per cent. Muscovite, 10 per 
cent. Biotite, phlogopite, oligoclase, garnet, labradorite, horn- 
blende, and piedmontite are also present. 
No. 5 sa rwZ.— Minerals other than quartz, 30 per cent. Potash 
feldspars (orthoclase), 5 per cent. Muscovite, 8 per cent. Phlogo- 
pite, hornblende, biotite, epidote, rutile, garnet, tourmaline, labra- 
dorite, andesite, andalusite, and enstatite are also present. 
Silt.- — Minerals other than quartz, 65 per cent. Potash feldspars 
(orthoclase), 2 per cent. Muscovite, 35 per cent. Phlogopite, 
biotite, garnet, hornblende, epidote, rutile, zircon, plagioclases, and 
augite are also present. 
(13) CARRINGTON LOAM, SOIL. 
No. 4 sand. — Minerals other than quartz, 6 per cent. Potash 
feldspars (orthoclase and microcline), 5 per cent. Xo muscovite. 
Magnetite and rutile inclosed in quartz are also present. 
No. 5 sand. — Minerals other than quartz, 15 per cent. Potash 
feldspar? (microcline and orthoclase), 10 per cent. Xo muscovite. 
Magnetite, hornblende, oligoclase, labradorite, albite, zircon, and 
corundum are also present. 
Silt. — Minerals other than quartz, 30 per cent. Potash feldspars 
(orthoclase and muscovite), 12 per cent. Muscovite, 1 per cent. 
There are also present magnetite, hornblende, oligoclase, labradorite, 
rutile, epidote, and an isotropic mineral with an index of refraction 
below 1.50, making it impossible to accurately determine with avail- 
able oils. 
(14) FOX FINE SAND, SUBSOIL. 
No. 4 sand. — Minerals other than quartz, 6 per cent. Potash feld- 
spars (orthoclase), 4 per cent. Xo muscovite. Magnetite, apatite in- 
closed in quartz, labradorite, oligoclase, and hornblende are also present. 
No. 5 sand. — Minerals other than quartz, 14 per cent. Potash 
feldspars (orthoclase and microcline), 8 per cent. Xo muscovite. 
Magnetite, labradorite, oligoclase, hornblende, rutile, and epidote 
are also present. 
Silt. — Minerals other than quartz, 26 per cent. Potash feldspars 
(orthoclase and microcline), 10 per cent. Muscovite negligible. 
Magnetite, hornblende, epidote, plagioclases, rutile, biotite, and the 
same ^determined isotropic mineral as noted in Xo. 13 are also 
present. 
(15) CECIL CLAY, SOIL. 
No. 4 sand. — Minerals other than quartz, 4 per cent. Potash 
feldspars (orthoclase), 1.5 per cent. Xo muscovite. Magnetite, 
epidote, rutile inclosed in quartz, zircon, and augite are also present. 
