Karl Wilson Gehrkens, Essentials in Conducting
“ It is our purpose in general to treat the scientific rather than the artistic side of conducting, and we are taking for granted, therefore, that the reader is endowed with musical feeling at least in a fair degree, and has acquired the rudiments of musical scholarship as the result of an extensive study of piano, organ, singing, ear-training, music history, harmony, et cetera, and especially by attentive listening to a very large amount of good music with score in hand. ”
