Thus, the construction of a bridge and the calculation of an eclipse equally involve the bases of scientific method, viz.: observation, deduction, and experiment; but each subject requires a special application of scientific method, suited to the varying nature of the subject of study.
Consequently, biological research, in order to be scientific, requires a special modification of method, because the new factors of sensation and consciousness come into play in biology—factors which do not exist in astronomy, or geology, in mechanics, physics, or chemistry.
In order to attain truth respecting biology, therefore, the facts concerning sensation and consciousness, and their relation with, or the way in which these new factors modify the facts of, physics and chemistry, must be carefully considered in this higher state, which we call life, or the investigation is not scientific, no matter how interesting as an intellectual exercise.
When first endeavouring to find a recognised definition of the term 'science,' I consulted the latest 'Encyclopædia Britannica' of our public library, thinking that from such an acknowledged authority a correct statement could there be
