A well dressed scholarly looking young man poses for his portrait at the Siegel Cooper studio in Chicago, Illinois. The man is wearing a thin bow tie and a surplus of pins. He has a pin on the lapel of his jacket and a larger pin on the lapel of his vest. He is also sporting a pocket watch. Also take note of his wire rim glasses. The studio that produced this photograph was located in the Siegel Cooper department store. The cabinet card gallery has developed a nice collection of images from this studio. To view these images, click on the category “Photographer: Siegel Cooper”. SOLD
THE CABINET CARD GALLERY 
That lapel pin resembles a pestle and mortar to me. Could be? Maybe he is a pharmacist (or a chemist? … nah).