Mathematics 30 GENETICS : A Periodical Record Of Investigations Bearing On Heredity And Variation 19 GENETICS: A PERIODICAL RECORD OF INVESTIGATIONS BEARING ON HEREDITY AND VARIATION 12 BOTANY 10 GENETICS 9 Report writing 9 Research 9 Calculus 8 GENETIC 8 History 7 AMERICAN SCIENTIST ( J ) 6 CROP SCIENCE (J) 5 SCIENTIST 5 Study and teaching 4 Algebra 3 Algebras, Linear 3 BIOCHEMISTRY 3 CROP 3 CROP SCIENCE 3 Curves, Algebraic 3 Curves, Plane 3 English; Research 3 Mathematicians 3 Problems, exercises, etc 3 Writing 3 AMERICAN JOURNAL OF BOTANY 2 Abraham Lincoln's political career before 1861 2 America 2 American literature 2 Combinatorial analysis 2