If Bobst or an NYU Consortium Library (New School, Cooper Union, IFA, etc.) does not own a book that you need, you can request it from Interlibrary Loan.
Subject headings in history of science tend to follow a pattern:
Scientific discipline -- History -- Time period or Geographic location.
Sometimes instead of a time period or geographic location, there will be a publication type, like "Periodicals" for journals or "Sources" for books of primary sources. Here are some examples of Subject Headings (LCSH):
Science -- History -- 20th century
Medicine -- History -- 16th century
Technology -- History -- Iran
Science -- History -- Egypt
Biology -- History -- Bibliography
Physics -- History -- Collected works
For more information, consult the Library of Congress Subject Headings (LCSH), a 5 volume set which contains the subject headings used in BobCat and other library catalogs. Copies of LCSH are located in all reference centers.