We request institutions that wish to borrow artifacts to provide graphs
covering four specific months of the previous year. While I am NOT a
conservator, I really wonder how necessary it is to keep graphs for a period
of years, unless you are gathering evidence to support the case for a new
HVAC system!

We tend to use ours more as a month to month tool for ensuring that there is
not excessive deterioration of the more delicate artifacts (such as works on
paper), due to environmental conditions.

Harry Needham
Special Advisor - Programme Development
Canadian War Museum
330 Sussex Drive,
Ottawa, Canada
K1A 0M8
Voice: (819) 776-8612  Fax (819) 776-8623
Email: [log in to unmask]

> ----------
> From:         Heather A. Ferrell[SMTP:[log in to unmask]]
> Reply To:     Museum discussion list
> Sent:         Wednesday, November 11, 1998 1:46 PM
> To:   [log in to unmask]
> Subject:      hygrothermograph charts
>
> Does anyone have any suggestions for how long an institution should keep
> (or
> currently keep) their hygrothermograph charts?
>
> Thanks for any information!
> Heather Ferrell
> Plains Art Museum, ND
>