Historical Examples. 1  The principal use of pyrite is in the manufacture of sulphuric acid. 2  Wherever flint and pyrite are to be had these are used for striking fire. 3  He, however, puts it on one side as merely a synonym for pyrite, nor can it be satisfactorily defined in much better terms.
Usually somewhere between 5 and 6 months would be the time when a male cat begins to reach sexual maturity and starts to spray. Although not all cats will do this, it is highly likely in unneutered males, especially if there are other cats in the house. That is why it is recommended to get them neutered before 6 months of age. Once a male cat begins to spray, neutering will help but it may continue to some extent if it has become a habit.
A. Male cats will be able to sire kittens when they are about 5 months of age. They should not be used for breeding, however, until they are 18 months of age. Female cats generally are sexually mature when they reach at least 80% of their adult weight. The timing of heat in a female cat is also dependent on the amount of daylight. Thus a female cat may have her first estrus anytime between 5 and 12 months of age. Feral (free-roaming) cats may reach sexual maturity earlier than indoor cats. Although a female cat is sexually mature when she is less than one year of age, she should not be bred until she is 18-24 months of age.