### device | instrument | compass:

Magnetic compass
* Magnetic Compasses are also subject to errors of lag and overshoot during turns
  - work by aligning the internal dial magnets with the earth's magnetic field
* are compasses
  - influenced by any fields other than Earth's
  - prone to errors in the neighborhood of such bodies
  - slightly incorrect due to effects of the Earth's magnetic field

Computerized instrument
* allow the data to be digitized for easy mathematical processing.
* enable doctors to remove the gallbladder with only tiny incisions.

Debenture
* are a common form of long-term debt in the company world
  - bonds issued to institutions
  - debt backed only by the general credit of the issuer
  - legal documents
  - marketable securities
  - the most common corporate bonds
* hold an important position in the overall capital structure of most companies.
* is an instrument

Densitometer
* is an instrument
* measure the amount of light reflected or transmitted.

### device | instrument:

Dialysis machine
* have carbon filters which are designed to remove chlorine and chloramine
  - features
  - follow features
  - properties
  - walls
* use water and a solution of salts and bicarbonate to filter a patient's blood.
* work by using diffusion and ultrafiltration.
+ Dialysis, How dialysis works: Medical procedures :: Organ failure
  * Dialysis machines work by using diffusion and ultrafiltration. A very fine material, called a membrane, allows blood and fluid to flow through it. In the machine, the blood flows in one direction, and on the other side of the membrane, a special fluid, dialysate flows in the opposite direction. Dialysate is a fluid that has different chemicals in it, such as potassium and calcium. A doctor would decide what mixture of chemicals would be needed for each patient. The dialysate has bicarbonate in it to lower the higher acid levels that these patients often have.

### device | instrument | dialysis machine:

Artificial kidney
* dialysis machine
* have several uses.

Divider
* are capable of separate rooms.
* are located in binders
  - cabinets
  - living rooms
  - math classes
  - notebooks
  - office suites
  - offices
  - streets
  - people
* are used for divides
  - sorting
  - useful in measuring distances on charts
* help keep males from claiming extra compartments, and can double occupancy rates.

Echo sounder
* help find fish and show bait, structure, and underwater features.
* is an inst rument to measure the depth of the ocean
* use sonar technology.

Economic instrument
* Some economic instruments can give advantages to domestic producers and thus have trade effects.
* are policy measures which explicitly affect private cost and benefits.
* use market forces to integrate economic and environmental decision making.

Endoscope
* are either rigid or flexible
  - electrical devices
* can view much of the system down through the throat and up through the colon.
* play an important role in medicine today.

### device | instrument | endoscope:

Arthroscope
* is an endoscope
* require smaller incisions, which means less time in the hospital and less time to heal.

Escrow
* is agreement
  - the procedure of withholding rent from the landlord and paying it directly to the court
  - when a buyer places money in the custody of a trusted third party
* protect the interests of investors in home mortgage loans.

Extractor
* are instruments.
* work by removing the sediment laden bottom layer of flow in a canal.

### device | instrument | extractor:

Forceps
* are extractors
  - large steel instruments like tongs that fit alongside the baby's head
  - used to pick up or hold small objects
* biopsy from an endoscopically visible lesion in the trachea.
* is an extractor
* tend to push smooth objects deeper into the canal.
* usually require an episiotomy which cut enlarging the birth opening.

Eyeglasses
* are part of frames.
* includes lenses
  - sections