January 20, 1875 – Company organized at 4246 Washington Street, at Poplar Street, Roslindale.
March 14, 1887 – Chemical Engine Company 4 (West Roxbury) was the first company on the scene of the Bussey Street Bridge Collapse, causing the commuter train to crash, resulting in 37 deaths and 75 injured.
1889 – Company members of Chemical Engine Company 4 (West Roxbury) in 1889:
1. Hoseman Thomas P. Lally, driver.
2. Hoseman James Edwards.
3. Call Man George W. Cobleigh.
4. Hoseman William C. Orrall.
1875 Babcock 100 gallon chemical engine at 4246 Washington Street, Roslindale.
March 10, 1892 – COMPANY DESIGNATION CHANGED. Company became Combination Wagon Co. 1.