The Popular Science Monthly, Volume 40

according action American animal appears become body called carried cause cents century changes Church cities color considerable contains course direction earth effect England established existence experiments fact four give given hand human hundred idea illustrated important improved increase interest Italy kind knowledge known learned less light living manufacture matter means ment method miles movement natural nearly never object observations once organ original passed period persons plants population possible practical present produced Prof published question reason recent regard region relations scientific seems seen Society species success theory things thought thousand tion United University various whole York