The first smoke detectors are based on optical principles - photoelectric detectors.
My first thought is to un-install it and install it back. Of course you won't have any of your houses or people you personally made.
Radon detectors are detectors that detect radon, a colorless and odorless gas that is second to only smoking in the list of causes for lung cancer. There is no record of the first hotel to employ radon detectors, but they come standard in most hotels due to their low costs.
The recommended time for first alert battery replacement in smoke detectors is every six months.
The first motion detector was invented by Russian Leon Theremin in the year 1920, but the first motion detectors used as a security device were developed in early 1950's by Samuel Bagno. The basis of these first detectors was the Doppler effect and ultrasonic waves application.
Alpha particles from americium ionized the air. An air with smoke has a different ionization, ionization currents which are also different are measured, compared and the detector (which was before calibrated) is ready ! The americium smoke detectors (with ionization) are not the first smoke detectors.
the first log houses that were built from settlers were in Delaware
the rich houses are bigger and the others are not
Install first,then delete.
I believe the first houses for the convicts would be canvass tents.
You should install the tile floor first. Install tiles on the entire floor, even under where the vanity will go.
The Apollo 11 astronauts Neil Armstrong and Edwin Buzz Aldrin, did indeed leave behind on the moon , The moon earthquake detectors was working very well as it was found that thre were indeed moon quakes It was placed on Trasnquality Base.