Stomata, 110.

Stones, 26, 31.

Stony loam, 29.

Strawberry flowers, 134.
perfect, 135.
pistillate, 135.

Study of plants begun, 6.

Style, 130.

Sugar cane, 5.
soil, 162.

Sugar in plants, 64, 66.

Sulphate of ammonia, 194.

Sulphate of potash, 199.

Sulphur in plants, 66.

Sun, work of in making soils, 32, 34.

Sunlight, and the farmer, 5.
necessary for leaf work, 110, 111, 112.