sentences:  The use of chloroform during surgery expanded rapidly thereafter in Europe.In the 1850s, chloroform was used during the birth of Queen Victoria's last two children.In the United States, chloroform began to replace ether as an anesthetic at the beginning of the 20th century; however, it was quickly abandoned in favor of ether upon discovery of its toxicity, especially its tendency to cause fatal cardiac arrhythmia analogous to what is now termed "sudden sniffer's death".