Evaporative respiratory cooling augments pit organ thermal detection in rattlesnakes

Rattlesnakes use their facial pit organs to sense external thermal fluctuations. A temperature decrease in the heat-sensing membrane of the pit organ has the potential to enhance heat flux between their endothermic prey and the thermal sensors, affect the optimal functioning of thermal sensors in the pit membrane and reduce the formation of thermal ‘‘afterimages’’, improving thermal detection. We examined the potential for respiratory cooling to improve strike behaviour, capture, and consumption of endothermic prey in the South American rattlesnake, as behavioural indicators of thermal detection. Snakes with a higher degree of rostral cooling were more accurate during the strike, attacking warmer regions of their prey, and relocated and consumed their prey faster. These findings reveal that by cooling their pit organs, rattlesnakes increase their ability to detect endothermic prey; disabling the pit organs caused these differences to disappear. Rattlesnakes also modify the degree of rostral cooling by altering their breathing pattern in response to biologically relevant stimuli, such as a mouse odour. Our findings reveal that low humidity increases their ability to detect endothermic prey, suggesting that habitat and ambush sites election in the wild may be influenced by external humidity levels as well as temperature.

List of Voters for the Town of St. Catharines, 1874

A paperback "List of Voters for the Town of St. Catharines, 1874" by Journal Steam Print. Richard Woodruff is listed as an owner on St. Paul Street in St. Thomas' Ward (p.8) and Samuel D. Woodruff is also listed as an owner in St. Thomas' Ward (p.8). Richard Woodruff is listed as an owner in St. George's War (p.16). There is an extra front cover included which is badly wrinkled and stained. There is a handwritten list within the back of the book which tallies the number of people in each ward.

Directors Meeting November 28, 1896 and By-Law No. 14 & 15

The meeting included an election of officers which resulted as follows: John Reid, President; Geo Barnes, Vice President; Geo. Barnes, Man-Director; J. Evans, Secretary. There are also two more by-laws (14 and 15) signed by both G. Barnes and J. Evans.

Barnes Wines, Limited By-Law no. 82

A by-law "to fix the remuneration and expense allowances of directors". It reads "Be it enacted as a By-law of Barnes Wines Limited: 1. That each Director of the Company be paid the sum of Seventy-five ($75,00) Dollars annually in respect of general services rendered by the Director in his capacity as Director, such remuneration to accrue from the date of his election or appointment as a Director. 2. That each Director shall be paid and allowed travelling and other expenses properly incurred in connection with the affairs of the Company. 3. That this provision shall be and remain in force and effect in the fiscal years of the Company, 1971 to 1973 both inclusive. Enacted this 8th day of February, 1971."

Letter to H.H. Collier of Houston, Texas from J. M. Long and delivered by Captain Daniels

Letter to H.H. Collier of Houston, Texas from J. M. Long and delivered by Captain Daniels. This is a friendly letter in which he mentions that General Edward Burleson has gone on an Indian campaign. Also mentioned are the Indian raid in Austin, the stealing of horses and candidates for the election. He also talks about a ball in Austin. This is actually quite a poetic letter in his description of how Austin used to be and what Austin has become (3 pages, handwritten), Aug. 26, 1842.