A rotary mulcher built at the nursery. Mulching.

Orillia Rotarians to help canvass for Simcoe University.

Rossport, Ontario. Donor: Karila.

Rossport.

Rossport.

Ross-section through a hammock of Cryorthod. N.B. Ah layer under hummock and ice wedge.

A full listing of roots slides as part of the Ken Armson fonds.

Roots of young poderosa pine in pumice soil (1500 yrs ago) n.b. the two-tiered root system.

Hockey stick roots of 2+2 white spruce, planted 1965, photo 1971. Aldina Twp. Thunder Bay, cf. slides # 155, 156 & 509