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.
The queen is stimulating the kittens to urinate and defecate for the first several weeks of life. Around four weeks of age, they will begin sand-scratching behavior. Initially, they follow the queen to the litter box and play in it. Gradually, by about six weeks of age, they learn to eliminate in the litter box.ome kittens will take a day to open the eyes while others will take 3-4 days. The retina matures around 5 weeks of age and the kitten sees clearly. The eyes will have a bluish color to them at first and then change to their adult color over time.