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After 10 years on a gluten-free diet (based on symptoms-only diagnosis), I'm
starting the gluten challenge today to see what a biopsy will show.  I'd
like to keep notes of any symptoms I experience.  To measure bloating
somewhat scientifically, I'm using a taylor's cloth measuring tape to
determine the circumference of my abdomen a few times each day.   My
question, which may seem rather ridiculous, is as follows:  is there any
inexpensive OBJECTIVE way to measure the smelliness of flatulence? (Call me
a cheapskate, but I'm not interested in spending a six-figure sum to
purchase my own personal mass spectrograph).

John Shaw <[log in to unmask]> Milwaukee Wisconsin USA