Phosphorus deficiency in jack pine at 25 days. Jack pine, 1+0, nutrient deficiency, phosphorus.

Phosphorus deficiency in seedling jack pine at 70 days from germination. Jack pine, 1+0, nutrient deficiency - phosphorus.

Phosphorus purpling in shoots of seedlings. White spruce, 2+0, nutrient deficiency, phosphorus.

Red canvas cover photo album. Imprinted in gold writing: The Whalen Building Port Arthur, Canada reinforced concrete and terra cotta eight story and basement office building constructed for the Commercial Exchange Building co., Port Arthur, Canada by…

Photo at Vivian of residual old white pine stump on deep sands that eroded after clearing for agriculture in mid 1800's. Pine were approximately 200+yrs and came in on previous Indigenous fields. Alfisol, HF, T, WN, D.

A collection of eight black and white photographs of various mining sites during the silver mining boom of the 1880's in the Thunder Bay District. These mining sites were collectively a part of the largest silver mining project in Canada at the time.…

A collection of eight black and white photographs of various mining sites during the silver mining boom of the 1880's in the Thunder Bay District. These mining sites were collectively a part of the largest silver mining project in Canada at the time.…

A collection of six black and white photographs of various mining sites during the silver mining boom of the 1880's in the Thunder Bay District. These mining sites were collectively a part of the largest silver mining project in Canada at the time.…

A collection of six black and white photographs of various nature sites that can be found in the Thunder Bay District, Ontario, Canada. Photos display the following from top left to bottom right:

1. Current River falls
2. Mount McKay
3. Kakabeka…

A black and white photograph of a collection of six drawings of various buildings in Port Arthur, Ontario, Canada. Owners/names of individual buildings have been identified from top left to bottom right as (along with any additional information…