The fierce extremes of heat and cold that are experienced, and the sudden changes of temperature (the thermometer varying sometimes twenty or thirty degrees in one day) must be very trying on the constitution.
(The fierce extremes of heat and cold; are experienced; ) (the thermometer; varying; T:sometimes; twenty or thirty degrees; T:in one day) (The fierce extremes of heat and cold that are experienced, and the sudden changes of temperature; must be; very trying on the constitution) (The fierce extremes of heat and cold that are experienced, and the sudden changes of temperature; very trying; on the constitution)
The fierce extremes of heat and cold the thermometer The fierce extremes of heat and cold that are experienced, and the sudden changes of temperature The fierce extremes of heat and cold that are experienced, and the sudden changes of temperature
are experienced varying must be very trying
T:sometimes twenty or thirty degrees T:in one day
very trying on the constitution
on the constitution