Williams's principal contribution to this movement was indirect and undocumented.
Denison's principal contribution was a novel gravity escapement that imparted unprecedented accuracy to the clock.
Mr. Chirac appears to view the new Quai Branly museum as his principal contribution to the Paris cultural scene.
The later book is considered by the high-profile Darwinist to be his principal contribution to evolutionary theory.
Popper's principal contribution to the philosophy of science rests on his rejection of the inductive method in the empirical sciences.
Her principal contribution to the work was a hundred-page chapter on Lucy Stone's American Woman Suffrage Association, rival of Stanton's and Anthony's National Woman Suffrage Association.
His work in France is recognized as a principal contribution to the first significant, wholly secular movement in French painting, the Fontainebleau style.
But as she told Harvard Magazine in 1977, her principal contribution to medicine was in finding out why so many babies died at birth.
To qualify, a teacher must be rated "effective" in three categories: instructional practices, including observations by the principal; contribution to the school community; and student achievement, including the teacher data report.
Perhaps the principal contribution of the Penck King theoretical ensemble has to do with the concept of lateral escarpment retreat, as opposed to the wearing down of lands favoured by Davis.
That same year, the second and last volume of his Blütendiagramme appeared (first vol., 1875; "Diagrams of Flowers"), his principal contribution to the study of the comparative structure of flowers.
