From: Denison, Charles. Exercise and food for pulmonary invalids. Chain & Hardy, 1895, page 26. Intended for expiratory pressure measurements only.
From: Denison, Charles. Exercise and food for pulmonary invalids. Chain & Hardy, 1895, page 26. Intended for expiratory pressure measurements only.
can you please put some more information about the instruments example: when it was made,by who etc.
I always do when I have that information. Many times however, what I find has no attribution or documentation. Take a look at my ‘wanted’ list. There’s lots equipment and people that have had a mention in a paragraph somewhere that I’ve been unable to find anything further on, even when they’ve been somewhat notable. I always try to mention the source material when I post something and you’re welcome to follow up and contribute with your own research.