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according American amount animals appear application association attention become body called carried cause cent changes character College color Company complete connection contains course direction disease effect electric engine exhibition experiments fact feet five four give given hundred illustrated important increase interest Italy known language less light mass matter means meeting method Michigan miles motor natural NOTES object observations obtained Office operation organisms original passed persons plants possible practical prepared present produced Professor published question received recent reference regard relation says schools Science scientific shown species station Street success taken tests theory tion United University various whole York