the animals being put into the cage to eating the food for the first time.[@CIT0024]

In the sucrose preference test (SPT), rats were trained to drink water with sugar in a quiet room. Two water bottles were placed in each cage at the same time. In the first 24 h, both bottles were filled with 1% sucrose water. In the second 24 h, one bottle had 1% sucrose water, one bottle had pure water, and two bottles were randomly placed. After 23 h of water ban, the rat sucrose water consumption experiment was started. After 1 h, two bottles of water were taken to weigh, the sucrose water consumption, pure water consumption and total liquid consumption of the rats were recorded.

In the forced swimming test (FST), the rats wereIce skating had already swept the city in the mid-1800s. But a few decades later, city residents took up a new recreational craze: skates on wheels.

They skated in newly built roller rinks, like the Cosmpolitan on Broadway in midtown, as well as on the street—as this 1893 illustration of girls skating on Park Avenue shows.

“Throughout the eighteen-eighties and much of the nineties roller skating was the principal pastime of citizens of every age and condition—business men went to work on skates, and skating parties were much in vogue among the fashionable,” writes Herbert Asbury in his 1929 book All Around the Town.

But it wasn’t just fun—some New Yorkers thought skates could fight crime.

“Several leading citizens and public officials seriously advocated equipping the police force with roller-skates, contending that