BELLEFONTE, February 12, 1870. REV. W. T. WYLIE: DEAR SIR: I inclose an extract from the report, suitable, I think, for the pamphlet. H. N. MCALLISTER. AGRICULTURAL COLLEGE OF PENNSYLVANIA. From an interesting and instructive report of the Professor of Agriculture to the Board of Trustees of the Agricultural College of Pennsylvania, for 1869, in relation to the results of experiments made upon the three several experimental farms connected with that institution, we make the following extracts touching the Potato, verifying and illustrating some of the principles set forth in the above essay: _1st.--Varieties._ Of upward of thirty different varieties experimented upon, the Early Goodrich, Early Rose, and Harrison are among the best and most prolific. LIKE WEIGHTS OF SEED UPON EQUAL AREAS OF GROUND. _2d.--Different Modes of Preparing the Seed._ CENTRAL FARM.--One fourth of Plot No. 11--Early Goodrich--_cut tubers_, yields 500 pounds, equal to 286 bushels per acre; _large and whole tubers_, yields 410 pounds, equal to 234 bushels per acre; _medium-sized tubers_, yields 419 pounds, equal to 239 bushels per acre; and _small tubers_, yields 486 pounds, equal to 278 bushels per acre. _3d.--Combined Diversity between Soil and Sub-soil and Common Plowing._ CENTRAL FARM.--The 4 plots, Nos. 11, 16, 116, and 416--_soil and subsoil plowing_--yields 6200 pounds, equal to 221 bushels per acre; the 2 plots, Nos. 216 and 316--_common plowing_--yields 1845 pounds, equal to but 131 bushels per acre. _4th.--Diversity between Letting all Sprouts Grow and Thinning to Three in each Hill._. EASTERN FARM.--Plot No. 208: Monitors; large and whole tubers, 21-1/2 pounds; _not thinned_; Moro Philips's superphosphate; yield 1174 pounds, equal to 168 bushels per acre. Plot No. 209: Monitors; large and whole tubers, 23 pounds; _thinned_; Moro Philips's superphosphate; yield 1042 pounds, equal to 149 bushels per acre. Plot No. 210: Monitors; large and whole tubers, 15 pounds; _not thinned_; stable manure; yield 860 pounds, equal to 124 bushels per acre. Plot No. 211: Monitors; large and whole tubers, 14-1/2 pounds; _thinned_; stable manure; yield 839 pounds, equal to 119 bushels per acre. _5th.--Diversity from Time of Cutting the Seed-Potatoes._. Plot No. 222: Monitors; _cut two weeks before planting_; yield 580 pounds, equal to 83 bushels per acre. Plot 223: Monitors; _cut at time of planting_; yield 819 pounds, equal to 117 bushels per acre. Plot 220: Early Shaw; _cut two weeks before planting_; yield 764 pounds, equal to 100 bushels per acre. Plot 221: Early Shaw; _cut at time of planting_; yield 907 pounds, equal to 129 bushels per acre. [Illustration: Massasoit.] [Illustration] Bresee's Peerless, or No. 6.