214 Clarendon Street, 502 Boylston Street, Boston, Massachusetts, United States.
Briefpapier-Lieferant und Verleger / Stationery supplier and publisher
A speciality of Maclachlan's was the supply of technical drawing instruments and materials to M.I.T. students.
Known publishing dates, between 1909 - 1915.
Known to be at 214 Clarendon Street in 1895 and 502 Boylston Street in 1910. The two addresses are only 30 yards apart.
Reference: The Tech Newspaper Advert.