RANGELEY — The Sunday natural science program at the Wilhelm Reich Museum on Sunday, July 26, will feature “Trees Enriching Our Lives” by Warren Balgooyen.

Balgooyen will give a program on trees and how they brighten lives. After a short talk, he will lead a tour of the museum’s grounds and identify the trees. The program will be from 2 to 4 p.m.

Balgooyen is a Colby College graduate with a degree in biology. He was employed at the Brooklyn Botanical Gardens, Brooklyn, N.Y., from 1963 to 1983. In 1983 Balgooyen became a freelance naturalist and landscaper in Maine. He is a board member of several conservation and wildlife groups, and he runs a small nursery at his home in Norridgewock. He writes a nature column for “The Town Line,” a weekly published in South China and contributes to the Birdwatchers Digest.

The observatory building details the life and work of physician/scientist Wilhelm Reich whose interest in the natural environment led to the introduction of the natural science program in 1989. The observatory is open Wednesday through Sunday 1 to 5 p.m. in July and August, September Sundays only 1 to 5 p.m. The adult admission is $6, children 12 and under, free. The Sunday nature programs are free.