Chicago, IL: McIntosh Battery & Optical Co. 1909. First Edition. , 158 pages. 8vo. Brown wrappers with embossed decorations. Front wrapper coming detached, some insect damage to the title page. Otherwise a bright clean example. Nicely illustrated. Good. Wraps. 
McIntosh Battery & Optical Co was established in 1879, and was a prolific manufacturer of electrical apparatus. Davis & Dreyfus (Finest Instruments) shows two copies of this catalog, OCLC one example from a previous year. We've seen a few copies over the years.
Much of the content is focused on the individual practitioner, and the focus has shifted (from earlier catalogs) to a wider range of equipment.