Traveling Comfort for the Dog (Dec, 1932)

Quoted ad text ( hilarious):

"ANYONE who has ever attempted a long motor trip on which a large dog was taken along will appreciate the “Bird-dog’s Palace,” recently placed on the market.

Made of sheet steel, insulated inside so that the animal will not come in contact with the metal, the “Palace” is so constructed that it may easily be clamped to the running board without marring the finish of the car. The barred door slides upward, permitting the dogs to be released without the driver having to leave his seat. An oil-cloth cover may be unrolled and buttoned into place if the weather is bad or the road dusty. The “Palace” is made in several sizes to accommodate all kinds of dogs."

Source: http://www.huffingtonpost.com/anna-jane-grossman/a-brief-history-of-pet-tr_b_1443825.html & http://blog.modernmechanix.com/traveling-comfort-for-the-dog/