I was wondering if anyone happened to know roughly how much does the average university physics professor spend each year on supplies for performing their experiments. I'm assuming that experimentalists would on average be spending a lot more on equipment than theory people who might only be buying computers and software, and that hard condensed matter people would need more money than soft matter people, but what exactly would the costs typically be? This question is assuming that the costs for paying for a grad students salary/tuition, prof. salary, travel/meeting costs and stuff like that are excluded. But that things like the cost for gloves, chemicals, equipment, electricity, etc. are included. It might be best to list the costs on a per grad student basis since many professors have more than one grad student and so they might spend more. Also, how does it vary between each particular research area, for example, superconductor research, plasma research, quantum dot research, liquid crystal research, particle research, etc.?