King from 871-901 A.D. The Danes were neighbors of the Norwegian Vikings, and like them were fond of the sea and piracy. They plundered the English coasts for more than a century; and most of northern and eastern England became for a ... Read more of Alfred the Great at Biographical.ca

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Most Viewed

- Never-yielding Cement
- The Deforming Mirrors
- Aigrettes
- A More Powerful Fulminating Powder
- A Liquid That Shines In The Dark
- Balloon Wheels They Are Made To Turn Horizontally: They Must Be
- A Lamp That Will Burn Twelve Months Without Replenishing
- To Make Artificial Coruscations
- Another Way
- Artificial Illuminations
- The Magnifying Reflector
- The Hour Of The Day Or Night Told By A Suspended Shilling
- Another Invisible Green Ink
- Another
- To Spin Sealing-wax Into Threads By Electricity
- Easy And Curious Methods Of Foretelling Rainy Or Fine Weather
- A Powder Which Catches Fire When Exposed To The Air

Least Viewed

- Stars With Points
- Winter Changed To Spring
- To Take Impressions Of Coins Medals &c
- To Tell A Person Any Number He May Privately Fix On
- The Boundless Prospect
- Vegetable Air-bubbles
- The Electric Aurora Borealis
- To Tell The Number Of Points On Three Cards Placed Under Three
- To Tell The Amount Of The Numbers Of Any Two Cards Drawn From A
- To Tell The Amount Of The Numbers Of Any Three Cards That A Person
- The Divining Card
- The Card In The Opera Glass
- To Make Pictures Of Birds With Their Natural Feathers
- To Diversify The Colours Of Flowers
- Caduceous Rockets They Are Such As In Rising Form Two Spiral
- Swans And Ducks In Water
- The Mysterious Writing

Invisible Red Ink

To the pure spirit of vitriol or nitre, add eight times as much water.

Use the above solution of violets to make visible the characters
written with this ink.

Next: Invisible Green Ink
Previous: Invisible Yellow Ink