Patents for Inventions. Abridgments of Specifications Class 68 (ii) Subaqueous Buildings And Structures , Diving, And Raising Sunken Ships And Objects .Period A.D. 1909 -15 AD 1916-20 AD 1921-25 AD 1926-30

All books are described as accuratley as possible.Bookplates and minor inscriptions are ignored in the description.Unless otherwise stated all books are published in London,8vo in original bindings and in very good condition.If for any reason the description does not match the condition,a full refund will be given if the book is returned within one week of receipt.Payment by bankers draft, cheque, or credit card M/C Visa Switch and Delta.