Aside from the papers themselves, the opinions advanced in the discussions ( published) by technologists and ... it necessary for one who wishe* to keep up with the tirnes, to add this book to his library and consult it fre- quently. ... J. B. Umpleby, chairman of the Petroleum Division for 1929, presents plans for this year which contemplate three meetings instead of two. ... of Petroleum Development and Technology for 1929 to 1930. H. B. Goodrich in Bull. Ainer. Assoc. Petrol. Geol. 1771.