Indexed Racks


Happy Fibonacci Day!

In addition to this Thursday being Thanksgiving here in the States, November 23 is also Fibonacci Day! If you remember from math class, the Fibonacci sequence is an integer sequence in which every number after the first two is the sum of the two preceding numbers: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ...
While it may look simplistic, the sequence actually has far reaching implications, more than even Fibonacci himself probably imagined!

  • Named after Italian mathematician Leonardo of Pisa, known as Fibonacci, who introduced the sequence to Western European mathematics in the 1200's.
  • Used in many different mathematics applications & algorithms, but also in investments, artwork, even architecture!*
  • The sequence can even be found in nature! Fibonacci spirals, aka 'nature's numbers' can be seen on flower petals and seeds, plant leaves, nautilus shells, the DNA molecule, and even hurricanes and galaxies.
  • The spiral is charted as a series of connected quarter-circles drawn inside an array of squares with Fibonacci numbers for dimensions. (see right).

Image: nautilus shell with Fibonacci spiral

A nautilus shell exhibiting the Fibonacci spiral.

Image: Fibonacci spiral charted on graph paper

The Fibonacci spiral charted on graph paper

No matter what order you like your numbers in,
our Indexed Racks keep samples organized!

Images: Indexed Racks by SPScienceware

  • Available in standard or serpentine numbering
  • Ideal when cell identification/location is critical
  • Round holes with tight tolerances hold tubes firmly


*There is so much more to explore in the Fibonacci sequence! We highly encourage you to do some research on your own to truly appreciate how complex and interesting this sequence is.

In observance of the Thanksgiving holiday, SP Scienceware will be closed Thursday, November 23 and Friday, November 24.