The dream machine I found very interesting. according to Everyday Electronics 1991, this emits pink noise, pink noise is advertised here to hypnotically induce deep sleep and claims dentist have used it to pull out teeth without anesthetic, sounds unethical but interesting so I did a bit of digging.

Pink Noise is “Pink noise is acoustical energy distributed uniformly by octave throughout the audio spectrum (the range of human hearing, approximately 20 Hz to 20 kHz). Most people perceive pink noise as having uniform spectral power density – the same apparent loudness at all frequencies. In pink noise, the total sound power in each octave is the same as the total sound power in the octave immediately above or below it. An octave is a band whose highest frequency is exactly twice its lowest frequency.” - http://whatis.techtarget.com/definition/pink-noise

This is a 10-hour video of pink noise, I think it almost sounds like water on a beach.

An interesting report in New Zealand Law Report VOL. 3 1885 was a case against Wellington-Manawatu Railway Company. 

“The Wellington and Manawatu Railway Company (WMR or W&MR) was a private railway company that built, owned and operated the Wellington-Manawatu railway line between Thorndon in Wellington, the capital of New Zealand, and Longburn, near Palmerston North in the Manawatu, between 1881 and 1908, when it was acquired by the New Zealand Government Railways. Its successful operation in private ownership was unusual for early railways in New Zealand.” - https://en.wikipedia.org/wiki/Wellington_and_Manawatu_Railway_Company
It was interesting to find out about this company as it was uncommon for privately owned railways to do well.